Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a6a69d58e36a24…

MALICIOUS

PDF

91.4 KB Created: 2020-07-28 16:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7da54c4ae6764defd68a2a02829d1995 SHA-1: dfa3b39295090b57ca5cc7343e7e6c2366507877 SHA-256: 06a6a69d58e36a245014f327d03af537137ceafea0f8190bcb0a001b556d0cb5
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, suggests a lure related to a crafting guide. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL confirms the intent to lead users to potentially harmful content.

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.cc/pify?keyword=advanced+crafting+guide+ff14
    • http://files.darbodus.com.au/uploads/1/3/0/8/130815437/divejigajer.pdf
    • http://files.prestonsociety.co.uk/uploads/1/3/0/7/130775795/973bcb.pdf
    • http://files.middlepassagehealing.com/uploads/1/3/1/6/131607404/76480a12.pdf
    • http://files.thevirtualdis.com/uploads/1/3/2/6/132695525/monuwawel.pdf
    • http://files.victoria-security.com/uploads/1/3/0/9/130969424/345ed5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/84042587263.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/rigagitiko.pdf
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/lofobovufidiju.pdf
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/zumefifuzuvajej.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/22520017540.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/16721076503.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/45632657414.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/64679030719.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/32525315170.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/89326189575.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/16324260827.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_off000129ed.bin
be3999ec94f3c82c29c7dfc8f34b3de9b2f0d85ee5bad30287f3ff77650a3161
pdf-font-stream PDF embedded font (sfnt) at offset 0x129ED 4940 bytes
font_01_sfnt_off00013ad4.bin
67c9598a13419994929b75e53f8c0ecb54ba84c0dffab821fef11cdc180b4fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD4 10960 bytes