Malicious PDF — malware analysis report

Static analysis result for SHA-256 2275e2ad3474e9f5…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 22:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c03e1f6d78b2f2f330919d205813203d SHA-1: 5b4fef0d9c7b6d7d89b0d10822a5d383d7dc3bba SHA-256: 2275e2ad3474e9f5a93b4c2b0ca27d3dc712d5a09587999e5ef86c963c521a66
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.ru'. The document body, though heavily obfuscated, contains text fragments related to 'diagnostic answers' and the redirector URL itself. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

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=i+ready+reading+diagnostic+answers In PDF document text
    • http://files.davisonavenuepta.com/uploads/1/3/0/8/130813851/dakanokori.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/1/0434/0069/1862/files/64666285564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/70703165933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/how_to_make_fake_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/6th_central_pay_commission_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/3_audio_songs_tamil_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/86355626178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/carbon_footprint_activity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/632816095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6812/1237/files/vue_component_external_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/atharva_veda_in_marathi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/65046773224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2287/7591/files/wotaditabutajikun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/80183913072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9489/files/bexibepinobazi.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 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 5208 bytes
SHA-256: 2fc9ff29705f62c13709f5c3b7c796c94f2271dcee892238cdb5b0baca39a5c0
font_01_sfnt_off000082d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 10160 bytes
SHA-256: 377586a94e1a96e55a6c5d683d1ae172deb6d788cfcbd02cc81aa6d2480f2c6a

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