Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f0d72f0b4948b2…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 04:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac335e16dc39c3e382646fa20a930b4 SHA-1: 7b07b0a145042244e70542ab74ed1a11f3034d24 SHA-256: 11f0d72f0b4948b285b52212cd4a5102f6b5813dcd4f13f60facb99984f0f03c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious content as a schedule. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. No scripts were extracted, but the primary threat is the redirection to a malicious site.

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=amtrak+adirondack+schedule+pdf
    • http://files.earlymustangclub.com/uploads/1/3/1/8/131858044/vujog-xosega.pdf
    • http://files.nuscouting.org/uploads/1/3/1/0/131070618/momogimizodupig_gejakiwuza_wewaso_xituleg.pdf
    • http://files.bti.ac.nz/uploads/1/3/1/4/131406173/893933.pdf
    • http://bazezaz.cobberdogtherapypuppies.com/uploads/1/3/1/4/131452883/6294801.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/77928862038.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/51378425773.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/grade_10_biology_textbook_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/xawabuzejanonare.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/91070322724.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9835/files/mebazenobefupifoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/79549587374.pdf
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/14963511836.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/kezaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/wigutuvipite.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de9.bin
9eb42a40f6cdfb249d9273a614994548197273e2b63df675e00620f68dff11f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE9 5448 bytes
font_01_sfnt_off00008047.bin
af4795524cf22ae4a33f4f82f20222e78b2c26c4b786192dc33d5c4785dcf545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 10332 bytes

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