Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f8681882215f0b…

MALICIOUS

PDF

62.0 KB Created: 2020-08-18 15:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b651b4bd8b9673603abb26b5e6f0b70c SHA-1: 8fae4b7cbb8cd203650bda50f22551cbcb9431e9 SHA-256: f8f8681882215f0bb7e4b5dd5a08a880f19a9db04d880f959ccfdb464e572318
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a mass of external links, masquerading as author guidelines, to a known malicious redirector. The primary lure appears to be a fake set of 'information systems research author guidelines' which directs users to 'https://ttraff.cc/pify?keyword=information+systems+research+author+guidelines'. This redirector likely leads to a malicious payload. The document also contains numerous other links to PDF files hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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.
  • 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
  • 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=information+systems+research+author+guidelines
    • http://mulewisuz.greatcommissionalliance.org/uploads/1/3/0/9/130969723/pitawevifub.pdf
    • http://solatuxir.missionepossibilehk.com/uploads/1/3/0/7/130740596/48f585a56.pdf
    • http://files.uvoholicsanonymous.com/uploads/1/3/1/3/131383648/refejuperi-ziviw.pdf
    • http://kemovo.balisupertickets.net/uploads/1/3/2/6/132683165/4406197.pdf
    • http://ruforakud.dentaldivalicious.com/uploads/1/3/1/0/131070420/vutabexutakuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/77928517186.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/sasex.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/robuworosotazefixafatex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/botefosedajuxasolizidetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/36955170818.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/automotive_industry_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7091/files/wewugiduka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/rejugujivoxidato.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/ubah_ke_word_candy.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/94353662856.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/23516023653.pdf
    • https://cdn.shopify.com/s/files/1/0448/1168/1958/files/types_of_assessment_strategies.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_off0000b471.bin
7496c1343ec1cd8862ba77cacd2052a917ebec60de95ab46b1cd5d5133f161c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 5472 bytes
font_01_sfnt_off0000c6e3.bin
515b6dbc175666f4a4fc97717b5f144efa81a9dd3861405a555c350b1e24b095
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 10472 bytes