Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad257ba83fa9a977…

MALICIOUS

PDF

47.5 KB Created: 2020-08-23 08:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b316230bfacad841416358f4e7a99c4f SHA-1: 7a458c24793b0cb2661fde60f6db42caf3eb5b20 SHA-256: ad257ba83fa9a97759485757026f19c27d2cdb23b0d00f98e12e7634750a3600
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL 'https://ttraff.com/pify?keyword=tripartite+guidelines+on+non-+discriminatory+job+advertisements' as pointing to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or distribution network. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent. No scripts were extracted from this sample.

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=tripartite+guidelines+on+non-+discriminatory+job+advertisements In PDF document text
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdfIn PDF document text
    • http://files.paulsumich.co.nz/uploads/1/3/1/3/131398547/tufegujak.pdfIn PDF document text
    • http://files.359yoga.com/uploads/1/3/0/8/130874067/a80e8aa868e1.pdfIn PDF document text
    • http://files.brandonarthurshindolcsw.com/uploads/1/3/0/8/130814124/pamadodekozomizo.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/1/0430/7812/3669/files/50423115125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/repijiganudelineraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/figixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/40446878200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/52306617957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2011/5358/files/29819118254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/list_of_useful_adjectives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5762/2689/files/php_show_latest_image_in_dir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/bft_gates_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/90815351766.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 3604 bytes
SHA-256: 2257209a7b6025a2f0083670c8e0d7974d363f432c5172f6b7b0dfee937e31d2
font_01_sfnt_off00007a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 5752 bytes
SHA-256: d5b03ff9a61e90061193b9a666833d6ba063dd68ac02504ad4d725de414a25cd
font_02_sfnt_off00008dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCB 9956 bytes
SHA-256: f508e1e6fcd3facaa5ef33da6ed1025ca13d60ed3ca0fca4c4be8181d0798a2d

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