Malicious PDF — malware analysis report

Static analysis result for SHA-256 92be38e96e3df78b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-01 15:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66fc46fdcf50fba694db7b6c05687701 SHA-1: d1cc7b88835f7fd9648526806e5471fd2afe89d5 SHA-256: 92be38e96e3df78be93cdcb06db9508472c960d317c0c80afc333463d9bff699
128 Risk Score

Malware Insights

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

The PDF contains a mass link farm and a critical heuristic firing for a malicious redirector link. The embedded document body text also contains the malicious URL, suggesting a lure to download or visit a malicious site. The presence of numerous Shopify links, while some are benign, is part of a common SEO poisoning tactic to distribute malicious PDFs. The primary malicious URL is https://ttraff.cc/pify?keyword=node+js+socket+io+example, which is likely used to redirect the user to a further stage of the attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=node+js+socket+io+example
    • http://files.somethingsoldsomethingsnew.com/uploads/1/3/1/1/131163953/dabiripejelepo.pdf
    • http://files.lembixlab.net/uploads/1/3/0/8/130814283/bokiwoku-xuzojojumanuzaj-poxekitugo-rimabavi.pdf
    • http://files.keithmiles.net/uploads/1/3/1/4/131407194/9e1637e98.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/34252725901.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/wolfgang_puck_pressure_cooker.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/79296318998.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/17782628539.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/18034928855.pdf
    • https://cdn.shopify.com/s/files/1/0438/4518/9792/files/xuketoxudetipex.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/jakoveletutiweruretelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/23528598451.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/34309461802.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/muresiti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619d.bin
b498971415e182f45e1bf276eae8992d5e63aea8fd96525db9b8817934209260
pdf-font-stream PDF embedded font (sfnt) at offset 0x619D 5300 bytes
font_01_sfnt_off0000739b.bin
8d8b78d48edaac4f6ba9cfe2708a1a690dd8bc0571f0e9c8495119e0c9cf1244
pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 2404 bytes
font_02_sfnt_off00007d21.bin
25d08c96afdd28ed9e228ba2063f4ffb7b1b34b3cc97b55ff6d451e54a8c21f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 11828 bytes