Malicious PDF — malware analysis report

Static analysis result for SHA-256 2638ef60c4cbf543…

MALICIOUS

PDF

36.7 KB Created: 2020-08-22 04:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9865d744490b7b61a8b70c533b0ba380 SHA-1: 51467f09ffd3d5c7ea55b85e318a901225257bdb SHA-256: 2638ef60c4cbf543918a3349f0b8ed7d95fa8d1cd39d6e2c06b88c2b9d0ff72a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and at least one critical link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a link farm designed to direct users to malicious infrastructure, likely for phishing or malware delivery.

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=arris+surfboard+manager In PDF document text
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdfIn PDF document text
    • http://files.forcesix.com/uploads/1/3/1/3/131379815/sosalifokaxaxobuw.pdfIn PDF document text
    • http://files.stpaulspreschool.net/uploads/1/3/0/8/130874524/717660.pdfIn PDF document text
    • http://tizilozes.stincrowvoden.com/uploads/1/3/0/9/130969280/zagirajukas.pdfIn PDF document text
    • http://vaget.vallenduuk.pl/uploads/1/3/0/8/130814873/77fe67.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/1/0428/6713/0534/files/45791693566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/lifobifibigotimab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/84502808761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/gosidufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/bomepepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/sobeboneje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3934/1216/files/finding_gcf_and_lcm_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/5121052209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/gabubudetadoviti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/dajabomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/95275302993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/91993179036.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_off00004dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCF 5324 bytes
SHA-256: 0d6b5abe3b34058435ca5b9a6afa5d3098134b7906cd08bebea004c8995de0ad
font_01_sfnt_off00005fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 10808 bytes
SHA-256: 6ab0ca606add21ca501da43d4a5883b6f618bd15cdbf1210cebb03b1e581b687

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