Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf63229e1de742a4…

MALICIOUS

PDF

33.7 KB Created: 2020-09-06 21:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c35e422e71579b485271a3de01bc92a SHA-1: 8aee662e33245272a23b00e93e9dbe330e8536f5 SHA-256: bf63229e1de742a45c999f3c1064dfbeeafb0384533305743aa99f928f4e37f2
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is disguised as a 'dog face mask template'. This redirector likely leads to further malicious content or exploits. The PDF also hosts a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility of the malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a phishing or social engineering attack.

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.link/wix?keyword=dog+face+mask+template
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/zevalajizokixuvizarukaxor.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/85574021936.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/15076732422.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5447/files/math_10_module_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/dubaxaduguxedejasezipes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/vobopetonaminetux.pdf
    • https://static.usrfiles.com/ugd/d954c5_51bb7abeb2ab4a9d9fe818dffc19f3fb.pdf
    • https://static.usrfiles.com/ugd/ef7486_bc71405cf1cb4cb09982a7fbaed7d542.pdf
    • https://static.usrfiles.com/ugd/575fb0_93f9d48517c74c2d9f9d1cce9ffd5d7a.pdf
    • https://static.usrfiles.com/ugd/f84671_cc64219a1eb44cddb6ac1ac0526860b5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0781/1482/files/bethesda_system_of_reporting_thyroid_cytopathology.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/net_credit_sales_formula.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/32772906373.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/ziwobos.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_off0000499b.bin
8087312c1d7d9adba0be1bf64bada796480dc1e61b83cc45e7674cb3fc73599a
pdf-font-stream PDF embedded font (sfnt) at offset 0x499B 5300 bytes
font_01_sfnt_off00005bb0.bin
43aa3c70d209f1226878573c58d209c42b52bbce4df771dafc1bf07dd45da2be
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB0 8956 bytes