Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4d1259975d2b37…

MALICIOUS

PDF

39.2 KB Created: 2020-08-28 00:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36d3ab01511704f5025480037c3ed81 SHA-1: d74d7efb4353c19ebcc343b48481761227d35945 SHA-256: 4e4d1259975d2b373a62fef253a1d3e739e7233011338d8cd2af30b6a5f6ab03
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though partially corrupted, contains the same URL as the malicious redirector, suggesting an attempt to lure users into clicking it. The ML classifier also strongly indicated maliciousness.

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=chevy+aveo+manual+transmission+removal
    • http://files.barbaradunn.com/uploads/1/3/1/4/131437380/029d65630.pdf
    • http://lodol.centralartrail.com/uploads/1/3/1/4/131409909/524ec2f51.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/gagufomomimamijadisate.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/81213139100.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/10071575909.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/99345304494.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/golmaal_again_4k_video.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/46946672614.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/play_store_game_jio_phone.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/vefuder.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/83053959547.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/vaxunirujubido.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_off00005ce2.bin
e92911d947d85d4e3d0b1dade101dcc2ab494d954d518d25961fb73c5d70730b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE2 4992 bytes
font_01_sfnt_off00006dc0.bin
11bf10b7bf1be3411f9866daaeefbfde51daddfd1319fd9992749425a8f45eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 10140 bytes

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