Malicious PDF — malware analysis report

Static analysis result for SHA-256 891c19ae3a1e9733…

MALICIOUS

PDF

40.6 KB Created: 2020-08-15 16:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50de2e29e0e5fe47144a682ac31d7315 SHA-1: 5ba94707cb689d7f533fa51b5ae618d4fd25d546 SHA-256: 891c19ae3a1e9733a42f31716c31156f820bb23a055d7088e6b9293045321594
136 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and links to a known malicious redirector. The document body includes urgency language and a URL that is likely part of a phishing or malware distribution scheme. The presence of a malicious redirector URL and embedded JavaScript indicates an attempt to lure the user to a harmful site, potentially for credential harvesting or further payload delivery. The PDF also contains a large number of links to other PDFs hosted on Shopify, which is characteristic of SEO link farm abuse.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=messenger+android+app+free
    • http://files.brigidgeorge.com/uploads/1/3/0/8/130814421/bowadutonopo.pdf
    • http://files.pvbcn.org/uploads/1/3/2/8/132814942/1223523.pdf
    • http://files.enactyourfuture.com/uploads/1/3/2/6/132681460/4547535.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/rei_backpacking_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/stihl_br_600_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5288/2330/files/39321809488.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/xilevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4616/4897/files/jonamevigasikojarunadix.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/bienestar_social_y_trabajo_social.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/12252184244.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/83308058840.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/logo_quiz_gouci_app_answers_level_27.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/caste_list_in_gujarat.pdf
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/vagunabe.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_off00006116.bin
8e72bcb7539a4c04949fde678e284a26a51eb6235dd177e6070c6712bbb767f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6116 5180 bytes
font_01_sfnt_off000072ca.bin
fec8a0ef9c7bf629589bbfa51ca5abc0e9c642d983c28036892030e749ec971b
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 10216 bytes