Malicious PDF — malware analysis report

Static analysis result for SHA-256 905bf30c35ca33c9…

MALICIOUS

PDF

80.4 KB Created: 2020-08-21 02:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac60c7d38f6e1dee03e39ada52a20c80 SHA-1: 87061eb3da6c63ac19580094d5301cc5164c6de6 SHA-256: 905bf30c35ca33c96c8e014c630891d2a400047143d16b3a6c0c70f5c9565f04
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=delhi+metro+map++pdf+file'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The ML classifier also strongly flagged this PDF as malicious.

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=delhi+metro+map++pdf+file In PDF document text
    • http://files.uccstj.com/uploads/1/3/1/4/131437402/jefal.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0437/4583/7208/files/15534692688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/63358921853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/gimuboviranotunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/xowapukitaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6704/9893/files/duplicate_sheet_trong_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3336/1574/files/3d_java_game_dedomil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/11048964789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/41847152252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/79979683167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/exercices_corriges_d_atomistique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/54384903948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/17383916423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/former_ceo_en_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/28334357854.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 4

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
stream_006_off00010193.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10193 17184 bytes
SHA-256: 16996e03c421de4e5d12888730f435f4c1c9f0659d5e3199c8370e1ead3b63b8
font_00_sfnt_off0000bec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC4 5104 bytes
SHA-256: c6f0684b612548dc6e99ae08ec46a1a0ca3dc68fdfd56efe12d9f62f4f7e6930
font_01_sfnt_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 16032 bytes
SHA-256: bb1906442c0f9c2eeece45ba6614642bbb846ff65cc1105eceee38b1a983c23f

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