Malicious PDF — malware analysis report

Static analysis result for SHA-256 87cd35f2fab04ee8…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 04:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43d0f146869b7b7a50e42899563fdf42 SHA-1: 193b7f1e0fbeceb56f7fdc139c3e4f96512252b4 SHA-256: 87cd35f2fab04ee88a2c5cfe7eef4870da621838117d6e0f526fbbd9c573febf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. This suggests a phishing or scam attempt, likely using a 'free download' lure as indicated by the SEO-related link farm heuristic. 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.com/pify?keyword=seamless+pipe+chart+pdf In PDF document text
    • http://files.ashleighmanning.com/uploads/1/3/0/7/130776828/fawefeto.pdfIn PDF document text
    • http://files.sjutsscience.com/uploads/1/3/1/4/131408528/gogosovunejipuke.pdfIn PDF document text
    • http://files.holgerloodus.net/uploads/1/3/1/4/131406985/sotorivezubokor.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/1/0432/7079/9510/files/tesadajetusunaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/tawexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/campbell_biology_11th_edition_etextbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/guwebefukelusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/69027532441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/miracle_shake_ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/65326233819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/vebim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/pearson_verbal_ability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/safety_equipment_on_board.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 1

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_off00006def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 5500 bytes
SHA-256: a1bd7cec533a4775aeeefc6d7daa4e77233fd0b8834bb1c8c9bbc6633722e22d
font_01_sfnt_off0000806e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806E 14660 bytes
SHA-256: 4db31614e3009ff0e9c5b7ac0238c4bc0b71f4ff4c1643973b49a3487f024e1f

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