Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c9b11f348f946e…

MALICIOUS

PDF

54.7 KB Created: 2020-08-30 22:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b588d7680d4e274fc78bf2675b58fb49 SHA-1: 3d2df27c04fd4c71d9bfd78feb86b1496cf1b315 SHA-256: 18c9b11f348f946e5ffe518abf95465c79daed1ce6c2de6b34771da36ba32053
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=ace+attorney+porn'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. While the document body is heavily obfuscated, the presence of the malicious URL and the link farm structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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.com/wix?keyword=ace+attorney+porn
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0466/9073/0148/files/pezelirok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/binary_number_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/silolaxasi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/15866144425.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/business_plan_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/bolosipabagaromosepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/67316021435.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/nelajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1050/5373/files/niriganopizuguz.pdf
    • https://static.usrfiles.com/ugd/e8506d_9dee6b2874554f6193d6697a97e6a3a7.pdf
    • https://static.usrfiles.com/ugd/0b46e6_40ad612d97f7405493e5475a8aa20291.pdf
    • https://static.usrfiles.com/ugd/b8c837_57857feb91ca481c9a83f02965e15cfc.pdf
    • https://static.usrfiles.com/ugd/fe83c3_226fd1f2c0524de1a8fe6160b6e1daec.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed59e422ec054ee081e18de4f03e6c5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_903caf40da2c4745b178f218f357d188.pdf
    • https://static.usrfiles.com/ugd/b8c837_53cc515528e94828ba874173d79c483e.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007226.bin
dddc528f7d90082952a016755f3876dbf58b7abec4f948ef3d03b95bef8b6e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 7748 bytes
font_01_sfnt_off00008c54.bin
b17ac892786b5e73e5b6542d5cb14af71138ded9fff7a30a77cbb9fe54deddb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 4548 bytes
font_02_sfnt_off00009bc5.bin
e9e99d8832e4e453a26df4b30a4e686ee7295bf8c74fe665beeddc5129321b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC5 10836 bytes
font_03_sfnt_off0000bf77.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF77 4324 bytes

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