Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dd39388333c6e3…

MALICIOUS

PDF

33.9 KB Created: 2020-09-03 22:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9857024b0de75c3ea0e0ba5b745cc29f SHA-1: 5ea2606a52f17aac95bfc46a5987171167fceccd SHA-256: 90dd39388333c6e335cb5ab565e445d54271f45f254ed1a3dd6e9a318ec6cce0
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'lip balm label template pdf' and includes the malicious URL. This indicates a social engineering lure designed to redirect users to malicious infrastructure.

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.club/wix?keyword=lip+balm+label+template+pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/43221737028.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/kijowaleli.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/ejercicios_de_ingles_present_perfect_just_already_yet.pdf
    • https://cdn.shopify.com/s/files/1/0435/8596/2142/files/79309589957.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/paul_clifford_edward_bulwer_lytton.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/57408274868.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/labepewizobizizofare.pdf
    • https://static.usrfiles.com/ugd/30e015_e96aa4fb714a4780b44e28bf94f2b2bf.pdf
    • https://static.usrfiles.com/ugd/0d2908_b328254260284773a7578050ef142517.pdf
    • https://static.usrfiles.com/ugd/f523c3_87161cb4727442eca193fb4f0868703d.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/fotolia_answer_4_letters_144.pdf
    • https://cdn.shopify.com/s/files/1/0451/0826/5125/files/fefatesunud.pdf
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/nirilogelavalixufiwalinop.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/hansel_and_gretel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/open_channel_hydraulics_sturm.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_off000048c3.bin
836ec33cc265024478b965b9b2934ac51488d0db8f91e4e25e8b77c5b05cdfa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C3 4992 bytes
font_01_sfnt_off000059b0.bin
b9b4e596a6da6ace1a82227d33efe42cb87c3b5d0b7c6fe019bd76760c783fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B0 9784 bytes

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