Malicious PDF — malware analysis report

Static analysis result for SHA-256 01624a9a33cca1f7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-03 11:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: abd18cf6f9abc4c92e49c41b9cf14bc2 SHA-1: f4654010327d1cece5c0626e1a4eb360f7221a85 SHA-256: 01624a9a33cca1f77d60004ad9fa5db373b81acb665fc171386c80d70859ff80
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a redirector URL, which is flagged as malicious. The document body, though obfuscated, contains text related to a "Helicoil drill chart" and the authoring application, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute content or lead users to malicious sites. 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.ru/pify?keyword=helicoil+drill+chart In PDF document text
    • http://files.asiaticofusion.net/uploads/1/3/1/4/131406592/5362764.pdfIn PDF document text
    • http://files.hometankservice.com/uploads/1/3/1/4/131453060/4174197.pdfIn PDF document text
    • http://files.yenbai.life/uploads/1/3/0/7/130776058/d3397.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/1/0435/9897/1038/files/jarofisumuvawodogafedug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/botejoluludu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7298/6015/files/89350690918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9304/8992/files/likajanirubunug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/79046285760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/31717415415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/44190317848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/97202546773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/21878999030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/wimegomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/zulezeregijurugigosufat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/dugonukilubareximip.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
🗂 Part of campaign: asiaticofusion.net 3 samples

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_off00005706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5706 4812 bytes
SHA-256: 72850a62d63d5ded7e08cacb6cb9a5a2a7224c04a71c6ed3cd9d993dbfbd1bfd
font_01_sfnt_off00006750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6750 10108 bytes
SHA-256: 21330e579d9adba51d6f0808cbd982b565117da915d0d3998b27d02fa84a634e

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