Malicious PDF — malware analysis report

Static analysis result for SHA-256 870c0f3bf67af2be…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 09:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24f6159e994d49d89f26a8c7e77dd53c SHA-1: bb994c6221f6fc1c0904429a038c925cf780e144 SHA-256: 870c0f3bf67af2be178f66cd4dcf0e9709638fd1d871e23571e7f7c2fbdf4e1d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a job description. This suggests a phishing or scam attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness, and the document body contains obfuscated text and URLs.

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.com/pify?keyword=data+analyst+job+description+pdf In PDF document text
    • http://files.heroesthrowdown.com/uploads/1/3/2/6/132681749/gavazazalamo.pdfIn PDF document text
    • http://sobeb.pogegraphicdesign.com/uploads/1/3/0/7/130776760/fametajusafazojurus.pdfIn PDF document text
    • http://xibovep.todos-juntos.net/uploads/1/3/0/7/130776445/xuvunobam.pdfIn PDF document text
    • http://files.eugenetoolboxproject.org/uploads/1/3/0/8/130813100/kuzotowarebepivupa.pdfIn PDF document text
    • http://files.jinternship.org/uploads/1/3/2/6/132682124/defawopovedala.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/1/0433/6081/3208/files/gawifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/80560379061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/juzosajiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5023/8101/files/11593272156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/44387237147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/94829564818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/50005474527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2905/9989/files/addition_and_subtraction_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/auto_tune_pro_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/dezemejipufekimolaretese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/81080715192.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_off0000673b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673B 5464 bytes
SHA-256: 3c6b7a172c804d1d177ea591911916b8a64cdbb436bfc6a44cae85096a214807
font_01_sfnt_off000079e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E9 9944 bytes
SHA-256: 3046cd6c6f3bd041138c166a9d6b39da0f040b01a33f4ce776d383f047bc33c7

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