Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cffbc94892c47d…

MALICIOUS

PDF

56.2 KB Created: 2020-08-31 21:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1560e5d8a12ede21717982a709faa817 SHA-1: 5be001241f82e3d75c2b19bee68575caf1843467 SHA-256: d3cffbc94892c47d6fc87c6ca19e0aaeed71872e5b347fe03fa3a52672bc56a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious infrastructure via embedded links.

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=kadambari+kannada+movie
    • https://static.usrfiles.com/ugd/b8c837_3382137978224093a2596f2a0e44a9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c92dc5782b14e0b80868bdc27535de6.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf32e965c29a4c1f94fa09da9f7de94e.pdf
    • https://static.usrfiles.com/ugd/d1c05f_f19b8a300e304016b1b00372dc1de449.pdf
    • https://static.usrfiles.com/ugd/c7a620_0189ad5403f94fde8c15d0ffac6b5b25.pdf
    • https://static.usrfiles.com/ugd/2ddd39_2c6b43e91e254d839da7d210acdb90b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c74718e4fbe434ea351fb67400623f9.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/34118280187.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/62040028792.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/wupivinugagulotawalilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/54789644380.pdf
    • https://static.usrfiles.com/ugd/b47706_1d760fddb4c648f488216c1fffc96139.pdf
    • https://static.usrfiles.com/ugd/49be48_ae25c081961245e5a5b2fe86c952a181.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ba846b4025f45488450396b5fc21405.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009312.bin
f8ec8b1c4cc18e244140d910cc80d744f49fd951bdaaa8612fe797c7611c1bf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9312 4992 bytes
font_01_sfnt_off0000a3f8.bin
9f4b3040edf63205f1d8c02f4225a2876bf98594646b75549a868ae26f98ee7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F8 2996 bytes
font_02_sfnt_off0000b0a3.bin
47fb3c45e0859c60ae6d02e617c9ed202ae870b7add84a17e6a2be49d37acab9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A3 10324 bytes