Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b78077644284cc8…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 09:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a68eb5e2b93d7cf83b60b06ab5e8ec8e SHA-1: a281422c4b6a2ad4470dc4458d2aef513bedc9a7 SHA-256: 9b78077644284cc86bdd1c2164d8a7ec670c0e2bd3b6a24f48df07acf22600bd
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, disguised as an 'accountant cv sample pdf', leads to a known malicious domain. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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 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.com/pify?keyword=accountant+cv+sample+pdf
    • http://files.readersbeware.com/uploads/1/3/1/3/131398533/9480383.pdf
    • http://files.riverdaleridge.com/uploads/1/3/0/7/130775014/bbc42ec5a22.pdf
    • http://gakod.healingartspathways.com/uploads/1/3/0/7/130738531/jeboguvozot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/manomov.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/medical_anthropology.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/vaccination_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/64170448689.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/wolofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/27464302418.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/jerololabibova.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/antioxidant_activity_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/14120131933.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/4237041376.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/botunujuvabufebagolad.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/agree_ii_tool.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/wagepipozekedufejagu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3277/8651/files/vector_td_2.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_off00006aa8.bin
060cdfd30aafd5d586f92f1c1a0ce69c5aa1a39887429dbbf188c964dfed3756
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 5088 bytes
font_01_sfnt_off00007beb.bin
9f42d5798ca1a8e04606e8a0d44d6a09f3ba079d9f12415c75ab5d34347abc0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEB 10536 bytes
font_02_sfnt_off00009fe8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE8 4324 bytes