Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cb183797de19db…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 09:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560940db4136f5ea203175bba6101b21 SHA-1: 8d00758fafbfbb301508f0902fe25d6076c3cfc8 SHA-256: 01cb183797de19dbe150991139ffc2818d7c07ccae75203ce90b55be69f28e38
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to streaming and the malicious URL itself. The 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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.ru/wix?keyword=le+labyrinthe+2+streaming+vf+papystr
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7fc11c3a676642a194389e4fea123cbc.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_d37d4e5564c44c3d9adaa56c2411ba97.pdf
    • https://static.usrfiles.com/ugd/b8c837_24693ea7847d4bafb96e0921e4ff8d9b.pdf
    • https://static.usrfiles.com/ugd/696b8a_23a81945d5f1473eb75398f8f5680664.pdf
    • https://static.usrfiles.com/ugd/87a178_d7cc55dedaa043fd809b0ae3e727d0af.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c5c661847a24ede85af15664830ebeb.pdf
    • https://static.usrfiles.com/ugd/cb4a18_de09b6a42b9c443688cb9acc255edbc1.pdf
    • https://static.usrfiles.com/ugd/8de238_c6ab6710a6fe4d60b36ae5b45a2842aa.pdf
    • https://static.usrfiles.com/ugd/83e24f_4211bb06b9b547749c1e3fc2eedfb76f.pdf
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/43863631054.pdf
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/saninovutanolediwiwumi.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_off00006a10.bin
562e68065cf676a5a45a8501acf8d07f48d5d0654a4d555734180ad47143a8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 5688 bytes
font_01_sfnt_off00007d4f.bin
008bd579a89580ff83315c14b90df233f329bfbce2e72fafb89cf734f6c72e15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4F 9896 bytes