Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc0c360a7b68fe4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-09 05:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916b0748d46804299aea51d6afa82508 SHA-1: 4803e545b2a881a2598ff40bb552712c33a4091b SHA-256: 6cc0c360a7b68fe40372627c54711056392279f244ef7af0b42b1dc5129e3d76
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link directs to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The ML classifier strongly indicated maliciousness, and the overall structure suggests a spam or phishing campaign.

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.ru/pify?keyword=ct+brain+anatomy+pdf
    • http://files.alertdriving.co.nz/uploads/1/3/0/7/130775633/8799309.pdf
    • http://files.exoplanetproject.co.uk/uploads/1/3/1/3/131384424/posozejiwub-ritexudu-tazux-befabivuk.pdf
    • http://lineronap.beccaspeert.com/uploads/1/3/2/6/132682646/dc3e79b6.pdf
    • http://fatid.jamieraeross.com/uploads/1/3/0/7/130738799/e4affa3d6c2ac11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/pedukukutubudopixetowave.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/67052810408.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/finogimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/18812076677.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/76897366732.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/rabosigalux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/dofirenosololezijakiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/anexar_email_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/laporan_pendahuluan_fraktur_antebrachii.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/xaludunudifik.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/wewazupufozevazadijoxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000605f.bin
991a06c57371152a6f776aea4a1120d861cc5ffdf563e82e7bc6404b1cf30569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 4912 bytes
font_01_sfnt_off000070f0.bin
e1f79311eb13037b3b0ab323ed330518ca664087a326bf1846c38517fa6fb2e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F0 9696 bytes
font_02_sfnt_off00009225.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9225 4324 bytes

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