Malicious PDF — malware analysis report

Static analysis result for SHA-256 f685ac13b963d9d6…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 16:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23f2c63638c69dac45b2d8618cdbb500 SHA-1: 3750a27780ed60dd30f846370e5d87a6d329fc7a SHA-256: f685ac13b963d9d607e33a965bd80e45b1b68eab256bdb34427fdc2886d6c996
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary malicious URL being a redirector. The document body, though heavily obfuscated, contains the text '2018 buick lacrosse owners manual pdf' and the malicious URL, suggesting a lure to trick users into downloading further content. The ML classifier 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.cc/pify?keyword=2018+buick+lacrosse+owners+manual+pdf In PDF document text
    • http://files.mrsfaoro.com/uploads/1/3/1/4/131452827/tezodur.pdfIn PDF document text
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdfIn PDF document text
    • http://files.dansmoncerveau.com/uploads/1/3/0/7/130739786/78378f4838f.pdfIn PDF document text
    • http://foninoz.qualitycraftedstoragesheds.com/uploads/1/3/1/3/131380606/5344732.pdfIn PDF document text
    • http://files.shsbusinessclass.com/uploads/1/3/1/4/131483097/gezupudavopu.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/wekisod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/igcse_biology_experiments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/tubirixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/hindustan_aeronautics_limited_annual_report_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/surijetubenalaxixal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3411/5233/files/biwuxum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/65008492060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/kifubupezotifukisoberulod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5607/8758/files/45727516760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/zerinitikepujit.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_off00005908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5908 6020 bytes
SHA-256: 82c024876640ae4ca29e6b488680b6335d2d788445e831bc4ca6d24407ba2848
font_01_sfnt_off00006d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 10012 bytes
SHA-256: d28ca405f2496ceab50d4e11693ac191b05231e238bcd4cbdfad77aa6b112cfc

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