Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc30f26f7eec3fa7…

MALICIOUS

PDF

54.0 KB Created: 2020-07-14 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69e09624e1601afb4ad8289e8cff615 SHA-1: 2441936e300476a0e6f7b0106ad4dcce7bcf5e1b SHA-256: bc30f26f7eec3fa7f70bb265299243ff1444863ada77617365d23cad98003c13
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via these links.

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.com/pify?keyword=bootstrap+download+pdf+link
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.jjsdka.org/uploads/1/3/0/9/130969819/98a098cf.pdf
    • http://files.tesoltime.com/uploads/1/3/1/4/131406391/1473909.pdf
    • http://files.julietteyoga.org/uploads/1/3/2/6/132681316/7414463.pdf
    • http://files.purrkur.com/uploads/1/3/2/3/132303023/561622.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/2701286053.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0433/6212/3941/files/50438895552.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/nisubajanijadaw.pdf
    • https://dawujokori.files.wordpress.com/2020/06/13710696546.pdf
    • https://sifuvuviluz.files.wordpress.com/2020/06/wesadidaj.pdf
    • https://winodav244765842.files.wordpress.com/2020/06/mefuxevunin.pdf
    • https://pomufoj.files.wordpress.com/2020/06/lunavazesejokejodofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/bisaloretusovebebewexare.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/59660927325.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/82278819201.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/xamiloveradok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/6594562416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/82376721014.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_off00008ae8.bin
a890da263a95ce7d58e174b532c2f6cfe204ba7e0bd1db92a6607983a2bea033
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE8 4912 bytes
font_01_sfnt_off00009bb1.bin
bee3904c7a6888c47e2912bcba082d4cf62325133c8dccc9c5e538f82e67d531
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB1 14820 bytes