Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b74a6a607d3da3…

MALICIOUS

PDF

45.8 KB Created: 2020-08-20 18:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20e57d1d614527070844a56be9295fa9 SHA-1: 58922c56bff9f88aedcb9714448855a6c7df4bbb SHA-256: 04b74a6a607d3da3b3078af63f5ad5fc52f4cc6ca67f4651cd53f5e7c6b8c050
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for malicious redirector links, pointing to 'ttraff.cc'. The document body, though partially obfuscated, includes the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to benign Shopify URLs but also including a suspicious link to 'zagilaso.wildeaboutexploring.com'. The ML classifier strongly flags this PDF as malicious.

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=bootstrap+form+wizard+with+validation+example
    • http://zagilaso.wildeaboutexploring.com/uploads/1/3/0/7/130776131/8130000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/bucket_list_movie_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/zegetegipiniwiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/12945645927.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/51109962722.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/zibivibivixewit.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/maxilejugilesow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/dozono.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/jovosedozigofelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/38344878959.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/vunun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057a7.bin
d5c7e5b26581836ed242617720be94e867a93841084da37a9a4ea6867767e660
pdf-font-stream PDF embedded font (sfnt) at offset 0x57A7 5388 bytes
font_01_sfnt_off000069f3.bin
3e8cba90424390a1b29a20f099b5213f1b8b1bdacb38f372a43be0a059d3896a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F3 15148 bytes
font_02_sfnt_off000099a0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x99A0 4324 bytes