Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0323215c7b0cf65…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 05:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6e7893906fff2d897baf433c6487553 SHA-1: 86cdebf76d13690bb450a0011a1ddb7e7d5937d4 SHA-256: d0323215c7b0cf658700f385a69337636018075a9009a3159154ac4a8448ea3a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including a redirector link to 'ttraff.ru' which is flagged as malicious. The document also functions as a link farm, hosting numerous external PDF files, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, and the document body is heavily obfuscated.

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.ru/pify?keyword=reported+speech+present+tenses+exercises+pdf
    • http://files.lynettesawatsky.com/uploads/1/3/1/4/131453724/900467cfaa0a7.pdf
    • http://femoni.stephenvince.net/uploads/1/3/1/1/131164312/motatirajujira.pdf
    • https://cdn.shopify.com/s/files/1/0440/8265/9493/files/94721361095.pdf
    • https://cdn.shopify.com/s/files/1/0429/1805/1996/files/canon_printer_mx922.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/learning_of_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/butujivit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/17086393859.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/94716720738.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/betoperorisoteja.pdf
    • https://cdn.shopify.com/s/files/1/0441/1277/3272/files/fitew.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/company_logo_quiz_answers_level_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/32600559310.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/makelasetetajotepoluwerul.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/colman_electric_furnace.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_off00006012.bin
e6fea8f33aa4f51d084d17868f8fe754909ec3b8c26fb8fa87424e93c1f2cc67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 5076 bytes
font_01_sfnt_off00007162.bin
964092d76f38ac60ecd71d43bac2f1fbc2298e6bbbba2f506f754f72e07a685a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 10160 bytes