Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a934d1553c6fd0…

MALICIOUS

PDF

43.5 KB Created: 2020-07-25 23:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9afb78c6c8017192245b00a17039d867 SHA-1: c66b3512067019d31a3b1f2385a25585caa97356 SHA-256: 06a934d1553c6fd0fbcfd6475ca408c0297293151535ba4f066b3a67a54706a4
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=pseb+12+class+compartment+date+sheet+2019', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The presence of urgency language further supports a phishing or scamming attempt. No scripts were extracted, but the primary attack vector appears to be the malicious redirection link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=pseb+12+class+compartment+date+sheet+2019
    • http://files.thegreenlemoncatering.com/uploads/1/3/2/6/132696210/f29656.pdf
    • http://files.buswaa.org/uploads/1/3/2/6/132682686/8656272.pdf
    • http://files.mdflatt.com/uploads/1/3/1/8/131857465/e58a69c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/73259980469.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/24262279827.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/ronejawoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/42443276175.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/terolonupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/nizabuparapus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lugoxiletix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/josamotuzeruxoxamiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/21685939152.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_off00006bed.bin
5f08149641c7f90b6418a8f0b0c4a93fc1f06a8094932c3320c880606f401c05
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 5676 bytes
font_01_sfnt_off00007eef.bin
6f208ec2a2a9b380b29943f289b05ec1c4d2be2cbd72237de649cec90ead7798
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 9940 bytes