Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b44f4bc9abe2505…

MALICIOUS

PDF

67.0 KB Created: 2020-07-31 14:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11fe4b6015e6f0081f28bdc5815c873d SHA-1: a58cb96f8f61f3f16a0d815e2cbd0bfd7c3149e4 SHA-256: 7b44f4bc9abe2505476b74ef3e10b9412af3604b4fb52a2a8055489961cb0b04
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to disguise the true destination. The document body and embedded URLs suggest a lure for downloading a book, likely a phishing or scam attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector heuristic strongly indicate a malicious intent to redirect users to harmful content.

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=emotional+intelligence+2.+0+full+book+pdf+free+download
    • http://files.skogenlab.org/uploads/1/3/0/9/130969322/sosomogogak-jafesinujobu-rapazaropukufi-bosomasovixujuf.pdf
    • http://files.commercialbondstexas.com/uploads/1/3/1/4/131452778/168fdaa7f11d.pdf
    • http://files.skycreekaussies.com/uploads/1/3/2/8/132815015/4697969.pdf
    • http://files.bluestarrichmond.org/uploads/1/3/1/6/131606133/ee70b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9903/8631/files/fimug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/41345373687.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/786597867.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/9236035702.pdf
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/sizatiwiremepokomuxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/wogofeteluma.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/xosatiletadakimax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/gavotakufomemiwolajuwes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/5779020896.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/741904962.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_off0000c710.bin
bd03fb14c3d6faddd9a99bfd77d8522ecb168dde403f1f48ae4fa2dd12741e90
pdf-font-stream PDF embedded font (sfnt) at offset 0xC710 5740 bytes
font_01_sfnt_off0000da8e.bin
7455dbd691b204790672afae2e9ffafe86017987d4765c175772e761846258de
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 10504 bytes