Malicious PDF — malware analysis report

Static analysis result for SHA-256 8553b82962921a05…

MALICIOUS

PDF

52.6 KB Created: 2020-08-20 14:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87e341bf864ad1588a0e439565d60740 SHA-1: f7c4f4a6ba03515dd5bc548b061ffa956bd532c4 SHA-256: 8553b82962921a05640237caa76de83fd8cacee26d4807354e72ea3f01daa6e2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirector infrastructure, specifically `ttraff.ru`. The document body, though heavily obfuscated, contains the same lure text and the primary malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed for SEO manipulation to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=friendship+status+in+english In PDF document text
    • http://dawuxejop.tavisdupreez.com/uploads/1/3/1/4/131438304/migakiwutekufalawez.pdfIn PDF document text
    • http://nafivul.ontoyouresale.com/uploads/1/3/2/8/132814930/gejipa.pdfIn PDF document text
    • http://files.jemendozalahc.com/uploads/1/3/1/0/131071067/zinokogodetij_jumasob_dudit_poroka.pdfIn PDF document text
    • http://files.csambhara.com/uploads/1/3/0/7/130775916/gepamefe.pdfIn PDF document text
    • http://files.changingfutures.org.uk/uploads/1/3/1/6/131606087/mufegesitawiko-matuwomap-xivekun-vokozufeletefuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/53822605911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/24135073102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/free_hockey_jersey_template_psd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/92715387476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/27474687201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2778/3080/files/10910458629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/arcmap_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/east_coast_roadmap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/gugekoguforevuxigefotifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/zagemaxuvetakageruz.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
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 5176 bytes
SHA-256: ce9441a5622ee9f7d6dbb179470432472a70dbc2a222ffd6e97f974664e37f35
font_01_sfnt_off000083e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E6 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00008c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 10432 bytes
SHA-256: e1b0ac85835d0fffa43a79000e69d13839362f3dd9d5d20b5b784cf4f9fd4742
font_03_sfnt_off0000af3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3A 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0