Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bcf988b8936630…

MALICIOUS

PDF

46.3 KB Created: 2020-08-21 01:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f76308d556f8d5e9c9e8ef6fbe9a82f SHA-1: c5f0c9954a9b1ea8fbaa4053a3174887b2e2e3e9 SHA-256: d8bcf988b89366307bf6de487fb30950b80e22ecf78e6bea02697394c0380bd7
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the extracted URLs, 'https://ttraff.com/pify?keyword=at%2526+t+cingular+flip+2%2528+4044o+manual', is flagged as a known malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

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=at%2526+t+cingular+flip+2%2528+4044o+manual In PDF document text
    • http://files.teachersfortomorrow.net/uploads/1/3/1/3/131398052/sukiw_joguz_vukolekenu.pdfIn PDF document text
    • http://files.woodstockvolleyball.com/uploads/1/3/1/4/131436956/wutanamow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/divaxajewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/zasenemuvorukuniguketeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/64736341285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/72696342991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/paruthiveeran_cut_songs_masstamilan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/limaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/domamamaziwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/78041603294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/watemadox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/ziwakimezev.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF1 3552 bytes
SHA-256: e0233268349c86e907e42c49801d4dc3b2744ee39c46e9fb197a7b0c684561d4
font_01_sfnt_off000079ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 10956 bytes
SHA-256: 0b668c603f2eb40080536d04946ee843dc5ce0a369da5cae8451ad1e9d7e1993
font_02_sfnt_off00009f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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