Malicious PDF — malware analysis report

Static analysis result for SHA-256 44008fa11e4dc236…

MALICIOUS

PDF

50.2 KB Created: 2020-08-26 05:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267717687460b9aaac3a6acd99a1caa1 SHA-1: 61bb5516102d96acf85008deec215450b9bb6401 SHA-256: 44008fa11e4dc2364246c41262cb1438ee26dde947501515244ce7c1d2557a97
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=game+of+thrones+tvmuse'. This URL is embedded within the document body, suggesting a social engineering attempt to lure the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or content-spinning operation designed to attract traffic. The ML classifier also strongly flagged this PDF as malicious.

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=game+of+thrones+tvmuse
    • http://dazer.seislagos.org/uploads/1/3/0/7/130775136/9504171.pdf
    • http://files.winkwinkbeautybar.com/uploads/1/3/2/8/132815172/6151ff1cfb2b2.pdf
    • http://files.breatheyogapilates.ie/uploads/1/3/0/7/130740571/459f22c6f0fb8b.pdf
    • http://files.treasuresofclay.com/uploads/1/3/2/7/132712282/vetodaterun_libefexiwuro_jutanoxodus_milakojurutuzo.pdf
    • https://cdn.shopify.com/s/files/1/0464/9549/8392/files/tasewexokotidonujewujavo.pdf
    • https://cdn.shopify.com/s/files/1/0463/6649/0779/files/59499891918.pdf
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/koneman_s_atlas_diagnostic_microbiology.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/4766051859.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/30003058622.pdf
    • https://cdn.shopify.com/s/files/1/0458/6127/3753/files/40754130806.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/sijoror.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0106/files/client_service_associate_interview_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/18527207098.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000724d.bin
c0fce0721bf81539c8b347000cfec8f5ad0337e48abb45b50dc744a97339b081
pdf-font-stream PDF embedded font (sfnt) at offset 0x724D 5064 bytes
font_01_sfnt_off00008370.bin
7d7eb0e3224374893e76336ac482d6b205f62a76acde1e9c487331371bc9f0ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8370 10120 bytes
font_02_sfnt_off0000a651.bin
0675882e6b69f458c44ffc28e64eff04cf685211912a4f9fe5191c0c0b1ab617
pdf-font-stream PDF embedded font (sfnt) at offset 0xA651 16376 bytes