Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e5acaab4ef3197…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 06:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2316a7c61ece90ee7b5718f474921248 SHA-1: 219fa2ef93c777c405827d48511108eb0d85fa2e SHA-256: c6e5acaab4ef3197e8790904ae0192cce5622e5c69c97143d0872b2ba40e1272
154 Risk Score

Malware Insights

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

The PDF file contains a high density of embedded links, a technique often used for SEO poisoning or redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The ML classifier also strongly indicated maliciousness.

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=music+theory+for+dummies+pdf+free+do
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/o_reilly_learning_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/vawojalumagatodoveva.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/82312712806.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/boynton_beach_fl_water_quality_report.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/yrc_bill_of_lading_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/sales_promotion_activities.pdf
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/meguvafadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/sunesafegubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/60610199706.pdf
    • https://static.usrfiles.com/ugd/d5415a_7b6006d2b04948a0a173d8645680e3ea.pdf
    • https://static.usrfiles.com/ugd/12745a_c51527d85f4d485f8f4df266feac4c5c.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_off00006055.bin
f14af5fc4850387bdcec592e220ec0ca625701fdcacecacc13451752e91af03e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5036 bytes
font_01_sfnt_off00007187.bin
50248b1618873af85e5792fbdd51b6a7fb9101e6388245d6815e6a36bbc9bb68
pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 10460 bytes
font_02_sfnt_off0000952b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 4324 bytes