Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3bb1acf15868ff…

MALICIOUS

PDF

36.3 KB Created: 2020-08-23 22:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1834fb2cd8b841e32d268f13a0596410 SHA-1: 91098d9db270a3fef1338f94074b7a0aa2ba933d SHA-256: 6f3bb1acf15868ffcd40150d25df3e79798f38902fe2944083c9b661aa2c3ac7
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 24 external PDF links, including a critical finding of a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=believer+cut+song++masstamilan'. The document body also contains this URL and other Shopify links, suggesting a lure to external content. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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=believer+cut+song++masstamilan
    • http://nububo.littlebluebowphotography.com/uploads/1/3/1/3/131380213/21cd5293.pdf
    • http://files.4loveofbaskets.com/uploads/1/3/2/6/132681698/2119523.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/biresusikimaxazamufara.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/posagonikuxalagelajago.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/fegisakubegulupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/6248078547.pdf
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/15247422119.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/48001715147.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/dusokigokowopafuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/57087000062.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/xilal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/14067123391.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_off00004425.bin
a778a0ec74c3c8b3374dd04fbd28c4203678393a4f42298f09289d19a5b27367
pdf-font-stream PDF embedded font (sfnt) at offset 0x4425 5108 bytes
font_01_sfnt_off0000556d.bin
787c0084a65ede066e6d19341a44179cfa7102e29a20b639793ac41eb1d50eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x556D 9632 bytes
font_02_sfnt_off0000767d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 4324 bytes