Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4f90a647ca2246…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bd591a562010f674fb42cec69b07cfa SHA-1: aeb4242c4b4b55f7e5617629462c2a1b37666428 SHA-256: 3a4f90a647ca224693852e0fb35d4155f4ec93421dbe969437f0b1997647ed8f
202 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru', identified as a malicious redirector. Additionally, it features a mass of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious destination. The presence of a 'download' call-to-action further supports a malicious intent to trick the user into clicking the link.

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.ru/pify?keyword=bonafide+form+pdf+download In PDF document text
    • http://files.tuftsasce.org/uploads/1/3/1/3/131398292/4937636.pdfIn PDF document text
    • http://files.assumptiondads.com/uploads/1/3/0/8/130814169/vunubisodive-siliw-vebulod-pudafofekas.pdfIn PDF document text
    • http://jawoni.bathswimtherapy.org.uk/uploads/1/3/1/4/131406149/d4b987fca34fe75.pdfIn PDF document text
    • http://files.elainehmacdonald.com/uploads/1/3/0/7/130739916/dajatupapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2946/2177/files/3670710190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4668/0214/files/laboratory_assistant_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/3008322008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/nizawoninanux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/26662365061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/52453374760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/84078547466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3137/5521/files/68207010853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/analogy_test_examples_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/44690171622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/5471604211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/vamaxemunapobipaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/vuluxelor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/lekaxinalonikoxuxe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E3 5152 bytes
SHA-256: a160a77197df605b282c359065478e2ec783de03cd6edac15c8bad29d09de5de
font_01_sfnt_off00006860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6860 9660 bytes
SHA-256: b0d253dc036a35595c6011247f55a44ffa6c37aa8853ef53a195486b36b4d0e1
font_02_sfnt_off0000898e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898E 6496 bytes
SHA-256: 7475c1a4da247130a53023ed068de4d85f893ce6bf6664265f44593f6ae0b107