Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a94b86ac71512c0…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 13:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d02124be1ad326e2ab9c90572db49f23 SHA-1: 9949296eba184bf3073d83b18aba86d804fab73b SHA-256: 5a94b86ac71512c0adb85d1dffa080e4eea18cc97c849672e45f546f20c9f6a3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, which is indicative of a phishing or scam campaign. The primary redirector URL is https://ttraff.ru/pify?keyword=cambridge+certificate+of+proficiency+in+english+5+pdf, which likely leads to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=cambridge+certificate+of+proficiency+in+english+5+pdf In PDF document text
    • http://files.sruthilayaa.com/uploads/1/3/0/8/130874154/8f351c89dfb9d6.pdfIn PDF document text
    • http://files.rfplfoundation.org/uploads/1/3/1/4/131437702/masebopepu-pilifuwi.pdfIn PDF document text
    • http://files.greenwichsailing.com/uploads/1/3/0/7/130775983/godigimudovanuf-wajov-zekodogunimuf-bobuvir.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/1/0433/0687/7080/files/39843759369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/88528192531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/37644174648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/robujegewarane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5462/files/puweduzipoturu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/3571845741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/bizoporufukazig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/97604894090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/orlando_weather_forecast_30_day.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/mevisisipasitidaxase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/nofosatuliselebopisidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/83832084151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/mivunenujowesipopeparozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.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 4

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_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 5840 bytes
SHA-256: cd1f4e306f5500f931daa3e2d0776acd6a6406b1a60a30b6f8ce81da9cb9a956
font_01_sfnt_off00007ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC3 10184 bytes
SHA-256: 18ddaa7fbd1032930099a4bd6fd0192cd41ef1d926335a5d641524a5979e9114

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