Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a6d18a8cdee13a…

MALICIOUS

PDF

36.7 KB Created: 2020-08-06 09:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad8c1a3c0de03436ca467b2c4aa18a18 SHA-1: 83d57b8daa8e810dc21d5a43f68905a88f2df235 SHA-256: 38a6d18a8cdee13a96676c8b26aa809d96ffdfcd922e2b154bff894e57a40347
194 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to PDF conversion and includes the same malicious URL, suggesting a lure to a malicious site. The presence of multiple Shopify-hosted links, some flagged as benign and others unknown, further supports the link farm pattern. No scripts were extracted from this sample.

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.cc/pify?keyword=convert+pdf+to+word+arabic+language In PDF document text
    • http://files.harpsdownunder.com/uploads/1/3/0/7/130738675/2ce4119f.pdfIn PDF document text
    • http://files.originalartworkdamienvenditti.com/uploads/1/3/1/3/131378993/wonokaro.pdfIn PDF document text
    • http://files.ahmedal-azzawi.net/uploads/1/3/0/8/130874097/8b9b5a73ea48a2.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/1/0433/0687/7080/files/zilifevuzumojewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2178/4472/files/arduino_string_to_int.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/g_suite_hipaa_compliant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/31063953159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/4683203084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/xanipoguzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/pituvodilelegasivirenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2014/0191/files/krups_ice_cream_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/faromiboragulejibulupakot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/76327955253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/83274266154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/18333462570.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 4

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_off0000519f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519F 5344 bytes
SHA-256: f2a82f22af7b5c1fde072d21b12683b5c4f33d4b1fee05e44cab11b2f9e6c0c6
font_01_sfnt_off000063e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 9928 bytes
SHA-256: 2ba278f18a0dd1546f3ef8a5102a6c53ddee69ee08ab73ae5610691f30315378

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