Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bee9c04af8bda36…

MALICIOUS

PDF

52.5 KB Created: 2020-08-30 13:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c25f283504e2f4cd66e5c8c155c9ad SHA-1: 4470b24622a073981c3df3a6751b8a9252d9a99c SHA-256: 6bee9c04af8bda36cecaeaaf4ff24f47cd325f7948a5b9e5fc2677ca5a8bae82
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one specifically pointing to a redirector infrastructure that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'No Man's Sky upgrade modules', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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/wix?keyword=no+man%2527+s+sky+upgrade+modules
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0462/6910/4279/files/17959953984.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/iata_dgr_57th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/93793236713.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/letubasomurapoxasije.pdf
    • https://static.usrfiles.com/ugd/c63dba_5d2ebba262e648548e33a3363519d9be.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/easy_broadway_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/0643/1130/files/risk_management_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/kalitupofifor.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/41824743258.pdf
    • https://static.usrfiles.com/ugd/b8c837_78d6fa8d79c14cc48711ea3eae8d0953.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_a6a85239ebf34cfcae010899fd201635.pdf
    • https://static.usrfiles.com/ugd/b8c837_078332b353264ecea8c877dd13db0412.pdf
    • https://static.usrfiles.com/ugd/b8c837_90c07018ecf4457aad1802b842a1e0c5.pdf
    • https://static.usrfiles.com/ugd/d5415a_529990e3df9d465e87ece73ba0d527db.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_off00007a8a.bin
78d417fc1ba7ce6d9630db80f12be76fd70957efee3aadc90fe4c9914f0006b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 5204 bytes
font_01_sfnt_off00008c20.bin
9bf2cc58084e625e091427132add89f0687a2713fa7952f327cbec4fe53e1f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C20 13792 bytes
font_02_sfnt_off0000b73e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB73E 4324 bytes

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