Malicious PDF — malware analysis report

Static analysis result for SHA-256 820be779335cc6bc…

MALICIOUS

PDF

33.8 KB Created: 2020-08-09 20:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8299c057844b9242932d092512d36074 SHA-1: 67dc83d1ea1fd1abbf32d0009895ba39ec8df119 SHA-256: 820be779335cc6bc90edbbee126c2a12832ff7bebd6434596a73aff5c1c3e83c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL, https://ttraff.ru/pify?keyword=software+architecture+in+practice+pdf+download, is associated with malicious activity. This suggests a phishing or SEO spam campaign aiming to drive traffic to malicious sites.

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=software+architecture+in+practice+pdf+download In PDF document text
    • http://files.gradeseven.nestmusic.org/uploads/1/3/2/6/132681891/zezipipit.pdfIn PDF document text
    • http://files.listingagentofatl.com/uploads/1/3/1/6/131607131/397860.pdfIn PDF document text
    • http://files.ritaparadisfineart.com/uploads/1/3/0/9/130969461/segirilataseb.pdfIn PDF document text
    • http://files.addycakescookies.com/uploads/1/3/1/4/131452804/xudeva-dokimesuge.pdfIn PDF document text
    • http://files.slikslymusic.com/uploads/1/3/0/9/130969176/7479971.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/1/0436/0221/5074/files/tibuxenumesunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7936/7845/files/91590826861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/fasajigenapoxagebigofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/18985813740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/medicare_benefit_policy_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/acquisitions_incorporated_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/ov_guide_adult.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/niligowijejolivomuwaluzid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/how_to_start_a_blog_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/sap_basis_course_content.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/67118851407.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 8

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_off000048eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5260 bytes
SHA-256: a3138637937aacf8fec5d83f03c41b35cbe0819c8b248c6c164444e14725bd87
font_01_sfnt_off00005adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADC 9164 bytes
SHA-256: f77ca78bd3c03229bbebc4890a2858f71d3b05526fa4cc05904c14e8468f49fa

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