Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe496970d9b6d7f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 21:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9c8cfc502de3d7d4cde9068314f7f1e SHA-1: b9215c2264a857745b184eaad7ff5f850bed082e SHA-256: dfe496970d9b6d7fb831476e74aa7d30c912980bc1ff9b2957390f9843bcfbcf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning or link farms. One critical heuristic identified a direct link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=alistair+begg+books+pdf', which is highly suspicious. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous benign-looking Shopify links alongside the malicious redirector suggests a sophisticated lure to mask malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=alistair+begg+books+pdf
    • http://files.summerlaneborzoi.com/uploads/1/3/0/7/130740256/b7bc014b8fb.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • http://files.sammungai.com/uploads/1/3/2/6/132681378/e364649c79fd03.pdf
    • http://files.ametkorca.com/uploads/1/3/0/8/130814297/tanuxanunek.pdf
    • http://files.el-zunzun.com/uploads/1/3/1/3/131379134/difafobotak-rotulukafot-dijiletuwup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/canon_80d_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/artist_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/maxelonaxadadako.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/8577355166.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/puvilebunabalolujiwok.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/engineering_vibration_4th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/38034500943.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/what_is_github_gist.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/eminem_lose_yourself_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/berlitz_english_level_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/gojikomavaropebaxoguwogun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.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_off00006c2a.bin
2b8b1c75a2aa207fe46a7f2bd0aae8a4e113564332f697de3e24ffabb05bca9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5404 bytes
font_01_sfnt_off00007e8f.bin
d1c9b69ca1b1b1130c091034839954c8be5f9098828a06851960671f3b8d3fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 10116 bytes