Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded8afd7ee4716e0…

MALICIOUS

PDF

36.2 KB Created: 2020-08-29 20:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21309c73362aee8908020afde5efb6a1 SHA-1: d7d33ad2266a82310debf0aa0b2b5997fb40dc6d SHA-256: ded8afd7ee4716e0884d3587c2789f61539e37781e974c63f7747ac54584634f
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a malicious URL, disguised as a download for a game. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body also contains the same malicious URL, reinforcing the lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm used for SEO manipulation to drive traffic to malicious sites.

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.cc/wix?keyword=download+game+gta+san+andreas+mod+ap
    • https://static.usrfiles.com/ugd/b8c837_f5f08c09417a4dd1b0fbff13dde06744.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bde45607d7d45798d5c14c2ef08990e.pdf
    • https://static.usrfiles.com/ugd/b8c837_025502a8e30d4c42b18c990bbedfe688.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d64aeb2fd244f58acb219daefbb57bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_19351ba1901849da88e26b143cfeac5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/rezafefovudowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/kemimikazoweneru.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/66666004708.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/mendelian_genetics.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/83143856047.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d041ea95fc0438da95402990f57da6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc7f93e8b811467cb0ed3ad494484435.pdf
    • https://static.usrfiles.com/ugd/b8c837_8432177643f44956bbf81b136dba065b.pdf
    • https://static.usrfiles.com/ugd/ace02d_b924947dbd66466a87bfcc0f57df8fa4.pdf
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.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_off00004ecd.bin
3a9915fa09b67f49f344ebf28dc242c56fbee6cb9f5534a52b9da5a8ae245118
pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECD 5368 bytes
font_01_sfnt_off0000610d.bin
379a34fe22098ef7631b13a2b32b61b6cda6f8ad70581ff74d10598de053c36d
pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 10280 bytes