Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14a55be41c9bba5…

MALICIOUS

PDF

46.8 KB Created: 2020-08-25 10:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f4cd92b002e6ce99d5860fa0b02c0b8 SHA-1: 6abfa643cbf76d6cb333885c488e371e58ca9cba SHA-256: b14a55be41c9bba5cf274f8d7935dc2b70c88dfcd175de3c287bc15c1ac5edc6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/pify?keyword=clean+room+design+book+pdf+free'. This suggests the document is designed to redirect users to malicious sites under the guise of providing a free PDF. The document body, though heavily obfuscated, contains the same lure text and URL. 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=clean+room+design+book+pdf+free In PDF document text
    • http://files.startingoverabuse.com/uploads/1/3/1/4/131453401/8813427.pdfIn PDF document text
    • http://files.gerardgauci.com/uploads/1/3/0/8/130874478/cc8bbb2e.pdfIn PDF document text
    • http://files.polloperu.com/uploads/1/3/1/4/131409508/lizojaw-gomeg-japodatabajo-musavojin.pdfIn PDF document text
    • http://files.fbcggyouth.org/uploads/1/3/1/8/131871569/6952c29e49e982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/27643013922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/fefaxeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4034/8059/files/50317606416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/rifezesebojagilowubigevow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/tituxisijukowuzixuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/cookie_clicker_save_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/ruvufikipobofox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/pivikigozuvozimazupezax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/pojitedaligebuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/vezuxakeloregigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0358/8258/files/29944632787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/22408886576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/87756050395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/komurowigewigedo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 5296 bytes
SHA-256: c070be0c2c2baf9ccdcb87a82c517dd5825c106a9c771f127822a810a8aa5337
font_01_sfnt_off00007d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 10028 bytes
SHA-256: 44644dc1da4223ea8c14ec26c3ac805ec55ee9abe4a81fa08f272ccc1abc90c3
font_02_sfnt_off00009f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F82 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230