Malicious PDF — malware analysis report

Static analysis result for SHA-256 d562b7749653b3e0…

MALICIOUS

PDF

59.8 KB Created: 2020-08-16 22:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a840e68fb1a38fb411e7e7e0d306822e SHA-1: b40083d7edf034275e0f6358f67889c6300a5620 SHA-256: d562b7749653b3e0d4224bc5cf4f7561ed2b2221a8d0ed68128dd9d81c69e224
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=ashoka+full+movie+sub+indo'. This URL is presented within the document body, disguised as a link to a movie, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which are benign Shopify URLs, but the primary redirector is malicious. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=ashoka+full+movie+sub+indo
    • http://fazimuzad.jennyrmorrispwms.org/uploads/1/3/1/4/131406436/7400197.pdf
    • http://files.krwoodworkings.com/uploads/1/3/1/8/131871894/1591208.pdf
    • http://tifuraxiz.millmountaincoffee.com/uploads/1/3/1/4/131407406/xakokebasus.pdf
    • https://cdn.shopify.com/s/files/1/0447/4788/2650/files/general_ecology_laboratory_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3950/5054/files/33395717551.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/possessive_pronouns_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/vunemegososogowo.pdf
    • https://cdn.shopify.com/s/files/1/0444/1692/5863/files/95853472147.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/5882288448.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/handbook_of_psychological_assessment_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/mississippi_driving_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/lidawiravakabor.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/git_readme_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/pcsx2_slow_motion.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a9c.bin
49c3a319186005f18d5b187661f79f7da73635574f350cd3a5264063d17c5639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9C 5304 bytes
font_01_sfnt_off00009c8f.bin
63accfd435b1d4e4f85654f1da010bbb4e8b441e1205e0f762307a0d3ca73e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8F 10620 bytes
font_02_sfnt_off0000c12a.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC12A 16164 bytes
font_03_sfnt_off0000d67b.bin
d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 2832 bytes

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