Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e842a3c2d61951c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 12:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80663bcc7a8e226142a79be01f3c7b91 SHA-1: 2a3980b987d69fe38b92d44e5125c04b126a31e4 SHA-256: 0e842a3c2d61951ceff5170903fb06fc954ceb244a476d3e3e8162eee7a29fec
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but some are unknown. The document body, though heavily obfuscated, contains the same suspicious URL. The primary attack vector appears to be social engineering via a deceptive link within the document.

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/pify?keyword=suspension+trainer+exercises
    • http://lipar.simply-sound.com/uploads/1/3/0/9/130969489/d89de2f8.pdf
    • http://files.rawbyelo.com/uploads/1/3/2/8/132814050/gujiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/blood_one_unit_whole_blood.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/devidozixumofitumin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/boxing_training_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/833445289.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/49640526481.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/66729989694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/85596032946.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/67634974030.pdf
    • https://cdn.shopify.com/s/files/1/0463/4705/9361/files/i_believe_in_you_song_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db2.bin
6e265210cca826556467311c951323d8b3a25f0e390a0719c78c405688f84af2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5068 bytes
font_01_sfnt_off00006ef8.bin
7f492f967221281f47717d28c3cc53bf3def3b4089d82b55eb495f8dcff667dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF8 10376 bytes