Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e7405e6b88b239…

MALICIOUS

PDF

52.7 KB Created: 2020-08-26 10:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88e3e16a6cc7b6fd4d16d9da0be97f24 SHA-1: ae9cc8231bc2adaa733954fe6a7a1f5634a17b4f SHA-256: b8e7405e6b88b239930471c3d9b5bcbde747a20c4b9b3a189dd81dfd8c7f3188
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a lure related to 'Nanatsu no taizai manga descargar' and embeds multiple links, including a critical redirector link to 'ttraff.ru'. This indicates a phishing or scam attempt designed to lead users to malicious content. The presence of a link farm further supports this, aiming to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the heuristics and URLs strongly suggest a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=nanatsu+no+taizai+manga+descargar In PDF document text
    • http://files.artbyldk.com/uploads/1/3/1/3/131398019/soxativa-bekakij-fedirosilo-zolasol.pdfIn PDF document text
    • http://vazex.lessonsworthlearning.org/uploads/1/3/0/8/130814229/tubalel.pdfIn PDF document text
    • http://nimobofa.clarksvillehba.org/uploads/1/3/0/8/130814328/jujarafemikol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/torofofamoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/48756432809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/continuous_femoral_nerve_block_ultrasound_guided.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/woputapejasazewimal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/wunidekamobopozunap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/35284422329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/apsara_aali_song_free_320kbps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/fenasurevugazolatelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4676/3677/files/dimekujoxepatufebepevogag.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5348 6744 bytes
SHA-256: 8187145963fbf8e0b7977f93bb9cbfc296fb812f6e2b6f40a3c8d31ca5a797a4
font_01_sfnt_off0000642f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 5128 bytes
SHA-256: 3df17ea97c24284ca57cc80282a7cd215055bb8ebeb0bab999f053f14d6f7b94
font_02_sfnt_off00007584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 2116 bytes
SHA-256: c0b080a3303b8e939d585112c399c02879d5f0d732e84daf845a916286948345
font_03_sfnt_off00007f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 10128 bytes
SHA-256: a59edec1b8481ca4de017a8e8ca18c6ed1fb831be9064cf8e23ca07a4a3ef942
font_04_sfnt_off0000a1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D1 16076 bytes
SHA-256: 980605bab78f247f088a71bdd4892ae66c44e1d79ae58e8941aae93b21ee85b4
font_05_sfnt_off0000b678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB678 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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