Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1bc2de94cef76b…

MALICIOUS

PDF

71.6 KB Created: 2020-08-23 15:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1804ac0be33e83413620062f8aab934 SHA-1: b53d2b927c7d55ca356bcb5b852745b08383c895 SHA-256: 8d1bc2de94cef76b661995b522b9e7fc1a73dd30b86cd7e71a0b1d6964478df0
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic SEO content, directing users to a malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL that triggers the redirection. This indicates a phishing or scam attempt leveraging a link-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=total+war+warhammer+dwarfs+army+guide
    • http://files.teacher-on-the-road.com/uploads/1/3/1/1/131163986/02025cb36b0118a.pdf
    • http://files.sterlingruralfire.com/uploads/1/3/0/8/130814042/jawevekinofusetare.pdf
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/herpetiform_recurrent_aphthous_stomatitis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/22610791139.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/63751292937.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/togufuxagifogepenone.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/windows_7_ultimate_iso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/vudapupigixenila.pdf
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/spring_framework_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/dovajozabetam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc17.bin
9a135777481daf6efd6d5d6662b9cde8059951affa6a541d79d047797a8f3b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 5464 bytes
font_01_sfnt_off0000eea0.bin
bafd1e22b1b2291670e08c4534be7087ec334878c34e31db2fbef5c0f1e42a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 10288 bytes

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