Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0b966c99811935…

MALICIOUS

PDF

35.8 KB Created: 2020-08-28 23:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 241b64403be90452221300232b3d4e3f SHA-1: 2b7443ba2ba5c7ea02a9cf200893010e7b9d4dc1 SHA-256: 7b0b966c998119359c0229787d8bb608e20890df4295c3b0f81214fc89b1253c
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous Shopify-hosted PDFs, with one primary link redirecting to a malicious domain (ttraff.com). This suggests a tactic to distribute malicious content or phishing pages through SEO poisoning or a similar link-based lure. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to redirect users. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=pfiffel+dps+calculator
    • http://www.pfiffel.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/75217525200.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/regipixajilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/tebojetawofiloponegufoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/bcg_matrix_explained.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/62069454529.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d175c591d8d45b98a37a652e5fb167c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d6608b009dd43d7ad134d5df9a149a7.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5990/files/metabolisme_karbohidrat.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/51239113994.pdf
    • https://cdn.shopify.com/s/files/1/0462/6992/3477/files/gre_essay_samples.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/3728064390.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/the_world_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/54163424543.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_off00004c80.bin
4dadb02da65758515787c141a913dc46e7f80f3522115fbaa1106f07583a6431
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C80 5152 bytes
font_01_sfnt_off00005e0c.bin
e656b138005ecca9755428135baf9dd19451e7790375f5f40a83e9ec59eb3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 10788 bytes