Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2e73957b6cf02a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 16:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50fa572891f67a7f0c441bc025d1e402 SHA-1: 12c5b66066de412719d24f4a9b81d764c274d311 SHA-256: af2e73957b6cf02a027054d4d888f7a5df8ed553fa2dbf377219ba863d94c11c
194 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.com', which is designed to lure users with a 'pdf file free download pc' keyword. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though partially corrupted, contains the same deceptive URL, reinforcing the social engineering attempt to trick users into clicking the malicious link for a supposed free download.

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.com/pify?keyword=pdf+file+free+download+pc In PDF document text
    • http://lubunep.topchoiceinspectors.com/uploads/1/3/1/3/131379803/fuxuv-gavisilu-demaxelojimon-gezolixefimita.pdfIn PDF document text
    • http://files.severnwildlifecarvers.net/uploads/1/3/1/6/131606652/wilepot-wagagunasilolas.pdfIn PDF document text
    • http://files.adultdaycenter.org/uploads/1/3/1/1/131163879/3329193.pdfIn PDF document text
    • http://files.occidentallodge436.com/uploads/1/3/2/7/132740277/4527271.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/1/0433/7631/2478/files/58822191000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/64708404501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/wezugubawubiwowir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/69975520555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/rerujepitasasikaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/joxuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56666804065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8136/6685/files/o_que__albinismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/digestive_system_test_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/caderno_de_caligrafia_para_baixar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/google_snake_bot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/tasonuwurutudadotipe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6C 5064 bytes
SHA-256: d13305219f363835ff231a44c9a3e2052368e93342bacc1f47731ac72dce8fd7
font_01_sfnt_off000080be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 10192 bytes
SHA-256: b66a67985ef26bcf6f0ccced049ce1a4353e1633e8582e1bd6a9d2d2f9af4eab