Malicious PDF — malware analysis report

Static analysis result for SHA-256 6406360c13339679…

MALICIOUS

PDF

38.6 KB Created: 2020-08-26 16:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de3a383c379d7f015b3b63803cb641b SHA-1: cc20d40f3c7ae1a70f03737f0a2568cd34f040ab SHA-256: 6406360c13339679a4f9d127850eb31da2d6b32c79a67a9d8e2980578c6d3579
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and heuristics indicate it contains a large number of embedded links, including a known malicious redirector. The document body contains text and URLs, with one URL pointing to a malicious redirector and others to a link farm. No scripts were extracted, but the presence of numerous links suggests a phishing or malicious redirection attempt.

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.cc/pify?keyword=segundo+molar+superior+caracteristic
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0464/2494/8888/files/link_adobe_audition_3._0_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/49323028040.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/alabama_new_hire.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/certificate_of_appreciation_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/95946276261.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/luromizofidijuxaxozef.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/role_of_national_interest_in_foreign_policy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/dubabuxuwobefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/fundamentals_of_computer_graphics_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/developing_the_leader_within_you_wor.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_off00005894.bin
5c9c74b2a8fd96fef34d2a80b636fbc85f0244a57afec9fc26e3eb0df40e4255
pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 5496 bytes
font_01_sfnt_off00006b24.bin
0d9dedde47b3561e19eb77836fd4ec1a6b75d55f4dcb3c1b8f848c98ad661b81
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 10292 bytes