Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc19ac36d85fa4d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 17:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67bf24fc8ab921f72f788e033dc5d5bf SHA-1: bcbaabe6153cc860965e05839edd227bf3552ba6 SHA-256: adc19ac36d85fa4d6ce43c39a536c9f57bca6371234ea56a7fa50bc7e0265939
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=accounting+equation+problems+and+solutions+pdf'. This URL is embedded within the document body, disguised as a link to accounting information. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the ttraff.cc redirector, which likely leads to a further malicious destination.

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=accounting+equation+problems+and+solutions+pdf In PDF document text
    • http://files.prepstep.biz/uploads/1/3/2/3/132302764/liwupadisojix.pdfIn PDF document text
    • http://files.childrenfirstcurriculumusa.com/uploads/1/3/2/6/132681212/12b8bfe.pdfIn PDF document text
    • http://files.bobgamblephotography.com/uploads/1/3/0/9/130969607/sawovipemu.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/1/0457/6722/9606/files/vitojegal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6354/9847/files/40748570341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/rabakigepubajalubexog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/vilirujereratagiwukegax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/android_p_vs_ios_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/1097650250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/32801287804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/hematology_rodak_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/29313155218.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_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 5732 bytes
SHA-256: 3a8a0706731f8946f29da8b075306f0a72eec3a154a76b6e0d4e63a31894c3ac
font_01_sfnt_off000076fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FC 10224 bytes
SHA-256: 28e31cedef84dacdc420209a9233f60a1a9b4609765568aec436bdcecf8f9e10

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