Malicious PDF — malware analysis report

Static analysis result for SHA-256 e421732079eae5cf…

MALICIOUS

PDF

43.7 KB Created: 2020-08-16 20:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67105c715e060e31b94e1cddd02379d SHA-1: 67e719ecc8f0240d254201b382d05100ae91807b SHA-256: e421732079eae5cff59b0e6b5e6abc027593ce64a6e451effa473f0086c8d192
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=jaaneman+chupke+chupke+movie+song'. This indicates the document's primary purpose is to lure users to this malicious site. The presence of a large number of external PDF links, while many resolve to benign content, suggests a link farm or SEO poisoning technique to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=jaaneman+chupke+chupke+movie+song
    • http://files.giantsparrowpress.com/uploads/1/3/1/4/131437532/subelore_kumupexugelo.pdf
    • http://files.badassgirlworld.com/uploads/1/3/2/6/132683142/dcd773fe8e66.pdf
    • http://files.shannonkmccurdy.com/uploads/1/3/2/7/132740767/nuwegiximorumop_vabexuzaxot.pdf
    • http://files.mwilkinson91.com/uploads/1/3/1/3/131382092/fipumu.pdf
    • http://files.hennyoverbeek.com/uploads/1/3/1/6/131637385/6502120.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/2127523723.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/cake_recipes_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/gikoxatoxuxisogijezize.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/tau_empire_codex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/tactics_for_listening_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/telijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/crown_of_the_earth_classic_wow.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/vikuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/xogomuzuwamekigekuro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005377.bin
aecab6c4ee9bc8d69f1c1b0f686338727aebf66a66fc7edc743ce13fd799a6b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5377 5332 bytes
font_01_sfnt_off00006574.bin
10af1b359732b33d6a26521b1567e7a11a09a94eb478edfe90e5fc8f1e8ecd00
pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 15344 bytes
font_02_sfnt_off000095cd.bin
dbe7de32c8e08e389462a2d711a243eda662daf5e19a71064eda43e7631fd73b
pdf-font-stream PDF embedded font (sfnt) at offset 0x95CD 3152 bytes