Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db255c0fc69cd6d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-07 06:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 930d828954d76343e217b89f37484699 SHA-1: c75cda1ea01d42cb54b7a407f1ba8ca1340863a6 SHA-256: 4db255c0fc69cd6d7dd46c54c851a3da9aff034985cdb9ce37897782adc13966
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document is designed to lead users to malicious infrastructure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic and embedded URLs further supports a social engineering attack pattern. The document body, though heavily obfuscated, contains the same redirector URL and numerous other PDF links, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=superlative+adjectives+exercises+worksheets+pdf In PDF document text
    • http://files.zerografx.com/uploads/1/3/2/6/132680901/subek.pdfIn PDF document text
    • http://files.honeybeearts.org/uploads/1/3/2/6/132682171/78412.pdfIn PDF document text
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.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/1/0434/0164/2135/files/truth_tree_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/97627874860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/ruxodetegatazagofib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/strophic_music_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/bepuzedujobilozigat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/5968140066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/rewimagelimazamaruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/xurixor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/dojuvavifem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDB 5484 bytes
SHA-256: 1d89f1840e98b556725d18fe37b5533755fb110a848cc61d627d78a20259839f
font_01_sfnt_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 9876 bytes
SHA-256: d2d81d1cf3284bb66eb3498000db1d6e8be5cf1b0b9e44802ae6e6922df89675
font_02_sfnt_off00008379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8379 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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