Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24b9fab4b609b27…

MALICIOUS

PDF

95.3 KB Created: 2020-08-12 02:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fb1c0371f097245dee3fb4f5ca0cdb9 SHA-1: 7323fff940d0b800e510cb7c95691ab162aff5a8 SHA-256: b24b9fab4b609b2763fc4ba5cd1f9af2817a21b949dd9d20aec957baeb1125e9
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the target URL and keywords suggesting a lure. No scripts were extracted, but the primary malicious activity appears to be redirecting the user to a potentially harmful site.

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=algebra+de+boole+pdf In PDF document text
    • http://files.townsendchemistry.org/uploads/1/3/0/8/130873718/4532037.pdfIn PDF document text
    • http://files.wandlevalleyforum.org/uploads/1/3/2/7/132710780/8179355.pdfIn PDF document text
    • http://files.michelleprocida.com/uploads/1/3/1/8/131856907/dimin.pdfIn PDF document text
    • http://files.nabasco.net/uploads/1/3/2/7/132741029/f90f472e19926.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/1/0436/0873/5907/files/tobenefezapakipaxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/sizajululonif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/bifuzuxasokujugid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/canon_eos_60d_user_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/26719002353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/19366622886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/82665147332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/medical_certificate_for_leave_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/vawukidudukiraxawafoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/jotowikejisepilivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavijado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/xawilafeduro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/artist_bio_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A2 5160 bytes
SHA-256: 95186d4cc2c23a9868e947daeba6c5668d904271c15060feca5fee8377abecd2
font_01_sfnt_off00012a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A36 14912 bytes
SHA-256: 3e71ec588486b3b57b70409db10dbaa652481208d08bc907c7c654ea6499bcac
font_02_sfnt_off000158ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EC 16560 bytes
SHA-256: a53204d173b45f95b8d4984f981fa84155fae23d83d27598e950ec72f8449fb9