Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85f820653a74a6c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 20:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75e8123fb67caf8a32b88530a974c68d SHA-1: 03563746c9c3559672f369a4dc5ca742b58b5a3e SHA-256: b85f820653a74a6c58f286343ec845df6d11e74722b4312eacb2391a6a0b630c
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content (crochet patterns) but redirects to a malicious URL (https://ttraff.cc/pify?keyword=beginner+crochet+patterns+pdf). This indicates a phishing or redirection attack. The PDF structure and embedded links suggest a social engineering attempt to drive traffic to malicious infrastructure.

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=beginner+crochet+patterns+pdf In PDF document text
    • http://files.thehistorytrail.net/uploads/1/3/1/1/131163666/sijogoxon.pdfIn PDF document text
    • http://files.katherineoday.com/uploads/1/3/2/7/132710779/cfe89a1aa9115eb.pdfIn PDF document text
    • http://files.rexmissions.com/uploads/1/3/1/4/131438464/jidaraduxomoledodin.pdfIn PDF document text
    • http://files.nicksforzamclaren.com/uploads/1/3/1/4/131438190/mafimebe.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/1/0432/7853/2758/files/rixinixidepemijulaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/32949746638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/26135564195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/patam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/45164620787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/salesforce_crm_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/70249684914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/2568578486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/1883482777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/zumejejiwodopapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/24374115587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/function_of_rough_endoplasmic_reticulum.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 5

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_off00007170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 5432 bytes
SHA-256: c576f52abfd4620c0d3cb2b59df7c65e3082c6034a9b8df2b8df1cc8fb61dcd7
font_01_sfnt_off000083ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 9964 bytes
SHA-256: 1fb2a9956fb0f7f0927e1cbc8f48fefb31b0403f192b9106528341844f4efb74

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