Malicious PDF — malware analysis report

Static analysis result for SHA-256 668b4b06c60ff07b…

MALICIOUS

PDF

53.7 KB Created: 2020-08-18 13:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50709dc8d7ff16046554a2eadad5805e SHA-1: 9da3b1ee9ade5475eda8b4ebccbdf8676740bd65 SHA-256: 668b4b06c60ff07bd78213f415d37db4d2aae8578c719d9affbdc86e1edd7e74
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though obfuscated, contains the primary redirector URL and references to other PDF files hosted on Shopify, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution scheme.

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=echo+chainsaw+manuals In PDF document text
    • http://waraj.stockbridgehousing.com/uploads/1/3/1/4/131406799/8962549.pdfIn PDF document text
    • http://files.organicfarmerdon.com/uploads/1/3/0/7/130776049/2355764.pdfIn PDF document text
    • http://files.thehealingdiva.com/uploads/1/3/1/4/131407734/7692d.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/1/0434/2602/1527/files/80741402270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/wejivuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/uji_non_parametrik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/45584293379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/mexagozosetugesowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/dictation_exercises_for_advanced_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/5933009116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/ginufibumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/manibusisuginetomorime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0730/9986/files/candy_convertor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/fodugipomepeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/pugeruvatamedidizuneluli.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 2

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_off000094d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D5 4992 bytes
SHA-256: 43440e5d8707aa32e8a60103b6dbb4eba7d02fc7503980bf67e5eab1fb6bb3ab
font_01_sfnt_off0000a5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B4 10572 bytes
SHA-256: fa189e5a355fa9a7e5a4c66d13fbba0de9bffd6b2ce09d7c1ccd0b31edc9cd39

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