Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac0e6c94be41c87…

MALICIOUS

PDF

54.9 KB Created: 2020-08-19 02:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4493cab55e0b83de849dbf016fe2929 SHA-1: feac001a9e96ed1047509ccd75ddec411b5e94e1 SHA-256: fac0e6c94be41c879cb18785b6a86563b93fb033237ea39ae56bf668fd84c29f
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL, suggesting a lure related to 'standard aluminum sheet metal gauges'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

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=standard+aluminum+sheet+metal+gauges In PDF document text
    • http://rivakara.businesssolutionsbydesign.com/uploads/1/3/1/1/131163635/8644589.pdfIn PDF document text
    • http://files.thefoodbureau.com/uploads/1/3/1/8/131856725/d2030836e.pdfIn PDF document text
    • http://dinotati.corsobooks.com/uploads/1/3/1/4/131407227/5302790.pdfIn PDF document text
    • http://files.janestraveladventures.com/uploads/1/3/1/6/131606393/c297cbfb0e024.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/1/0428/4180/0860/files/kabunofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/39321374427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/44749184183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/beremerumatumukokujukekus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/salarananitinajimupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7804/files/zevazakowit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/how_to_bold_letters_on_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/sotivaxolixunekobadeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/tirumukumapunovizidajuxo.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_off000098c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C2 5344 bytes
SHA-256: 6811c68991f58418550cb4b9c90457197bbb11ae6e24a262831c21774eb3dd2a
font_01_sfnt_off0000aab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAB0 10420 bytes
SHA-256: 355f7666be96ae073effb54e6e218606050274640feb4dc012a1c549df2709a6

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