Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa73c87d9fa415ae…

MALICIOUS

PDF

96.4 KB Created: 2020-09-10 10:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ac44ab19a75dfc0cead31865c963c4 SHA-1: 757d5708ffa4cc46a567d1a9098445ae2b50c449 SHA-256: fa73c87d9fa415aecf8c8f020ddbf5b91a17c91e948f78cdc4e6e7be6e55b97d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/pify?keyword=p%2526+l+report+restaurant', likely serves as a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external content, suggesting an attempt to manipulate search engine results or distribute further payloads. The ML classifier strongly supports the malicious nature of this PDF.

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.link/pify?keyword=p%2526+l+report+restaurant
    • https://static.usrfiles.com/ugd/d2759c_214658a257fb46318a417f34600a31bc.pdf
    • https://static.usrfiles.com/ugd/c8df25_2d0150100768444caba21ed4edf8f590.pdf
    • https://static.usrfiles.com/ugd/b3bc21_98bf14b0dc8441c2aa95628c7ae32cc6.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/28590108164.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://static.usrfiles.com/ugd/5be868_cea30c5ee11841b48ccd06ae8e318c54.pdf
    • https://static.usrfiles.com/ugd/b42fd6_0e3914cd47da44d481907dd633c9d17f.pdf
    • https://static.usrfiles.com/ugd/451461_9097b5f0245e47d6be5545297e948ab5.pdf
    • https://static.usrfiles.com/ugd/599f1c_9f28d9c25f9c47649c28bb268b826133.pdf
    • https://static.usrfiles.com/ugd/62e2c1_1677fd921b9745ea9d4ba0dd4ac85eea.pdf
    • https://static.usrfiles.com/ugd/37321e_ee2b962304224dcbaaeab5a4d968052b.pdf
    • https://static.usrfiles.com/ugd/d94ae5_3d988349888d4948b339d2cd00dfae6e.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_off00013eec.bin
bef1cd4f1d4c15ea35daafed947cf1f9783831cdf83f62cff999f5f34236052d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEC 4156 bytes
font_01_sfnt_off00014d15.bin
2625433b4075b607e9ee72c5aed5194047101692925e0874b69503e2e01c1fdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D15 11844 bytes