Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7402e28b2b5e77e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 03:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e43eb658c8b7918fd205443ecd978f SHA-1: 1ace82e3b4056ea23e5447085f4855ddac47f7b5 SHA-256: a7402e28b2b5e77e534a45e6665ec033b494ef24c0403066a0a6e5028a67f776
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, found in the document body and flagged by heuristics, redirects to a known malicious domain (ttraff.com). This indicates a phishing or redirection attack, likely aiming to lure users to malicious content under the guise of fitness-related information.

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=best+swim+workouts+for+fat+loss
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/toludegeromufuromo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/84400064157.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/balancing_chemical_equations_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/vugogixawidijujexova.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/divikibubunoremekovasak.pdf
    • https://static.usrfiles.com/ugd/f0e51d_66dd44ec2872408db4d0fe5b575056dd.pdf
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/azan_dua.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/sikitemexekuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/capital_budgeting_financial_management.pdf
    • https://cdn.shopify.com/s/files/1/0464/7524/7784/files/sesulonekuxefofelatibedig.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc315ba13a37423eb33f7e721aefa94c.pdf
    • https://static.usrfiles.com/ugd/a01749_ebbee59dfbfe4f849b2ebba6b81eac42.pdf
    • https://static.usrfiles.com/ugd/d902bb_11403cf2d30041c1a433404e3646f16a.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_off00006c19.bin
7fc842bb3c0b7caf2eee3d7ffe73fc9c4fda0a1f6a4f9fe5a3484feb5b2b3b7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C19 5120 bytes
font_01_sfnt_off00007d7e.bin
d52737f12ab0ab3ea7736e9f3323fd5632b8cb46b45ad879f26c60acf67e40aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 10272 bytes