Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e069bcca80d348…

MALICIOUS

PDF

40.3 KB Created: 2020-09-11 15:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb6639e416954163e163c66e7e36684 SHA-1: 0780b9c53692965488640d40594b229016ed0010 SHA-256: 40e069bcca80d348ca919fbfe372a19e246eff18136e5215f4ec8fd56f58e54a
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, indicating a high likelihood of being used for malicious redirection. The ML classifier also strongly indicated maliciousness. The embedded URL https://ttraff.club/pify?keyword=insulation+without+sheetrock is a primary indicator of this malicious redirection attempt.

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/pify?keyword=insulation+without+sheetrock
    • http://jenejoviv.summertraveler.net/uploads/1/3/1/6/131607600/55e44a704f80d69.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0f034a21b39484ca9803036e72f6feb.pdf
    • https://static.usrfiles.com/ugd/5af86b_5ea215f7b9974c3cb72ab2cceb84fc37.pdf
    • https://static.usrfiles.com/ugd/7aabb2_b54af16e35bf4817b2322455c1a561c7.pdf
    • https://static.usrfiles.com/ugd/b7ab08_d8565a6bd9e64244b09ce71332ec0956.pdf
    • https://static.usrfiles.com/ugd/a771bd_1a005a880e5045849c63b959f5fa624f.pdf
    • https://static.usrfiles.com/ugd/5f226e_1f5e915fd65346a7993f96ce115b73a4.pdf
    • https://static.usrfiles.com/ugd/cafc24_7312ed2219424a8393b973714888ad6f.pdf
    • https://static.usrfiles.com/ugd/5befcb_0c3fce62e6f04547b1f2c354841d0e17.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/5396364709.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/51660326022.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/pewuwikupumukujufanopape.pdf
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/august_alsina_all_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/4294/7481/files/english_9th_class_guide_book.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_off00006196.bin
c1af6fe12cb886f555018a31ae3eeaaae8801759e45d27719a37336215930e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 4980 bytes
font_01_sfnt_off00007291.bin
49638333cc5dfb3e7137a2caac3851ffc51b271576fc0d2316e1f58c92363fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 10104 bytes

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