Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7b8f8bfa302026…

MALICIOUS

PDF

67.3 KB Created: 2020-09-18 02:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd4af55e0bb17b39f28941a57b7340f9 SHA-1: 1c8f688aab6fe608b68772508ee636cda7d826d5 SHA-256: ec7b8f8bfa302026ef5ae943d32ccfe8b896fb75763c851a1fafaac74184c4f2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links pointing to external PDF files, indicative of a link farm or SEO poisoning attack. One of the embedded links, 'https://ttraff.me/pify?keyword=trigonal+pyramidal+polar+or+nonpolar', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to 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.me/pify?keyword=trigonal+pyramidal+polar+or+nonpolar In PDF document text
    • http://mexivi.threewillowfarms.com/uploads/1/3/1/4/131407395/8184374.pdfIn PDF document text
    • http://gigopuvep.dysoncommunications.com/uploads/1/3/2/3/132303189/pudidigowedoli.pdfIn PDF document text
    • http://kanixa.kathieallen.com/uploads/1/3/0/7/130738730/punux.pdfIn PDF document text
    • http://files.adcoblue.com/uploads/1/3/1/3/131398475/7ef5440e3830d.pdfIn PDF document text
    • http://xagivita.planning4yourfuture.com/uploads/1/3/0/8/130874175/8951789.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/1/0434/9480/1568/files/25245709376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/32607708158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/rabafalaguwire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/57164135250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/zuparosuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/jumew.pdfIn PDF document text
    • https://cd2a6e2f-1146-44fa-beb7-3664b124d37c.filesusr.com/ugd/2274a7_0a9b021bf1974c5889da69b637be35f4.pdf?index=trueIn PDF document text
    • https://740fc708-cbcb-43bf-833c-5df3c62751a2.filesusr.com/ugd/868b90_e58cf824f7f940a9bfe3936123ace51f.pdf?index=trueIn 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
🗂 Part of campaign: adcoblue.com 6 samples

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_off0000c65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 5152 bytes
SHA-256: d5434770fcd700bebd175d64e8a193883b037051f92afb04970aa6df752f169e
font_01_sfnt_off0000d7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 12524 bytes
SHA-256: dd3a8f7c61d9bf2b16e5fdf721b6d6f84224c34302f690c0acb1b7deeab6c60d

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