Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a468b74a60a26f9…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 20:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf19cfc0a8376f6716de95fd8e4e959 SHA-1: e323f349e31109694ee9e11a5737ae78782f9367 SHA-256: 7a468b74a60a26f9ac7213c5930357b2807944dca876859945565e743f2322b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.com/wix?keyword=se+beber+n%25C3%25A3o+case+1+filme+completo+dublado, is flagged as a malicious redirector. The document body, though heavily corrupted, contains this same URL and appears to be a lure related to a movie title, likely intended to trick users into clicking the malicious link.

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/wix?keyword=se+beber+n%25C3%25A3o+case+1+filme+completo+dublado
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/93484479850.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/26379209599.pdf
    • https://cdn.shopify.com/s/files/1/0450/3299/7022/files/more_agile_testing_lisa_crispin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57308776079.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/gokavajijaxipumokiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/fowunegej.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/deruluxukoxis.pdf
    • https://cdn.shopify.com/s/files/1/0463/1409/4749/files/jasperactive_word_lesson_4_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/xewaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/kisagit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/melee_attack_5e.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_off00004bc3.bin
7c6ff7c89e52d250503587e37d5ce0a6625f366f98a960c26b1fed45982f7d55
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC3 5916 bytes
font_01_sfnt_off00005f2f.bin
60aea63b75605948727bc629ae0c153a85a24645e6fc1828b4575eebe36a17fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 11824 bytes