Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eee2e2a52b35cc…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 21:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79375c0178558689a3e5aeab7f6285e SHA-1: 6b7a1b4a65b8e638e86c69e24280b81a9b67c80e SHA-256: c6eee2e2a52b35ccd1f60ce5f654768e13b1f4376a4ff33facbf6e301a1a8dc8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also features a large number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=personality+vocabulary+list+pdf, which likely serves as a gateway to further malicious 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.cc/pify?keyword=personality+vocabulary+list+pdf
    • http://lunuxi.cartooning4kids.com/uploads/1/3/1/4/131438464/demizonemi_gisef_xijejatemufem.pdf
    • http://files.lighthouseofzachary.org/uploads/1/3/1/3/131380128/wafizetutiji.pdf
    • http://files.stettleragsociety.com/uploads/1/3/1/6/131636808/sufexulofugajozukob.pdf
    • http://juvefeji.changeboutique.com/uploads/1/3/0/8/130814229/bee99b729e2a5c1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/29043807041.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/pezukujiluxezusutanuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/34998514542.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/zemumuxafobaluvafukizajen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/poultry_production_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/69145298469.pdf
    • https://cdn.shopify.com/s/files/1/0436/0519/6957/files/rojutuganulomoxike.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/vokiresamupetobil.pdf
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/que_es_la_acidosis_metabolica.pdf
    • https://cdn.shopify.com/s/files/1/0434/3096/9511/files/48612540581.pdf
    • https://cdn.shopify.com/s/files/1/0437/7500/0730/files/all_branches_of_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0429/6412/3814/files/10792449000.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/nodowakiwinobidebajeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/arteria_carotida_interna_ramas.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_off00007ef9.bin
740ba18b064371a44d574aa653b76353b4ecb5b32cbde55a744278bc83cd131f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF9 5452 bytes
font_01_sfnt_off00009190.bin
7a98df3dbaf7085141978fc78c40c10ced26bf3d5740bce3d46e2315edbf952e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9190 13552 bytes

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