Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9172762fc3a8601…

MALICIOUS

PDF

55.0 KB Created: 2020-08-08 20:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eefed0e4df0e227417824165e099596b SHA-1: c3f628025463da5fa0f679f07e5bb0402de9745a SHA-256: d9172762fc3a860160da33cb2074e827464fc0fd7d3b79e313534b069ffe5d6c
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The primary heuristic indicates a PDF link farm, suggesting the document's purpose is to host numerous external links, likely for malicious redirection. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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.ru/pify?keyword=hex+head+bolt+dimensions+pdf In PDF document text
    • http://files.clarkecountymentorprogram.org/uploads/1/3/1/4/131438308/8063269.pdfIn PDF document text
    • http://files.coffeerosaguam.com/uploads/1/3/1/0/131070762/bc5b231c36.pdfIn PDF document text
    • http://files.wonderworkslearningandarts.com/uploads/1/3/0/8/130814226/faxelu-wivabe-sidowepib-taxotasokel.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/1/0429/1559/4393/files/58938841341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/1st_grade_phonics_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/96910483220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/lucky_patcher_no_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/john_deere_lx178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/12734041042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8266/files/59461591353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/bivutixep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/saxon_sharbino_snapchat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/mapapox.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 2

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_off00008f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 5356 bytes
SHA-256: 68771f41eafe3f47c289b51220cba481fe111e6beea6c1d4efb142da2bde0908
font_01_sfnt_off0000a163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA163 14656 bytes
SHA-256: a2e47bbb61a0395c1fbf1996d5ae62b8d95f6e24e72c579a544bce75a98919df

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