Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d471a89657888b1…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 02:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d67c4b5eb68f185ff41e833b19c2667 SHA-1: 5ec771c7d9faf9003c137fa24d81f8df74b51d47 SHA-256: 6d471a89657888b10724c80fabd7288a0e56d7a67d9bc30a3a292240ea0e90c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, identified as malicious. This suggests an attempt to direct the user to a malicious site, likely for phishing or malware distribution. The presence of a large number of external PDF links also indicates a link farm, potentially for SEO manipulation or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/pify?keyword=business+card+template+illustrator+file
    • http://files.esamomar.net/uploads/1/3/1/6/131636954/botob.pdf
    • http://files.lcooperillustration.com/uploads/1/3/1/4/131453402/lozupopu-bedota.pdf
    • http://files.throwercustomdesigns.com/uploads/1/3/1/3/131380717/lujis_zupigaluvivexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/tazazodokozusakifen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
    • https://cdn.shopify.com/s/files/1/0448/0414/5309/files/analog_multimeter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/internship_report_for_computer_science_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/54461059226.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/northstar_5_listening_and_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/48638556514.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/kilidudumifid.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6757/files/tulajukogavozivew.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1275/files/lomawugadas.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/pubudozilok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/lajiwemobatajomorumikad.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_off00006242.bin
914d7d5f0921ac422493dcef1047be642f73b758beb4f91f89157b2788837c32
pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5348 bytes
font_01_sfnt_off00007452.bin
e64a5d92f80230f33be5fada6a4b771ca83aefbb8ef63e433ddb7ba495a1739c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10728 bytes