Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec3d9480b68975a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 20:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a82022b29d5ffe7ad2810b93d52b19c SHA-1: 544bcec68e0646ed5952d44e0b86c6f7bcaa57d1 SHA-256: 5ec3d9480b68975a4359ca72248213faf9b8bfeb96a10d222f3df432d9c4962d
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=slick+magneto+manual'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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.ru/wix?keyword=slick+magneto+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/0828/4056/files/cellule_caliciforme_histologie.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/video_film_baby_s_day_out.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/14944778177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/rubberhose_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/lufemugewo.pdf
    • https://static.usrfiles.com/ugd/b8c837_a307bbaee50b4c20bc0aacb279b4e8b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_870e0e68e57640e58ff529effbee9e36.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_ed0747f1bb4e4067b50e9b14a21ac954.pdf
    • https://static.usrfiles.com/ugd/ec0c41_660270f747514e619619e70206d18f74.pdf
    • https://static.usrfiles.com/ugd/b8c837_f19679b5f62d4be9bd21d34387228235.pdf
    • https://static.usrfiles.com/ugd/b8c837_f792ba54f7334e22b0ec3c5a7773eb15.pdf
    • https://static.usrfiles.com/ugd/b8c837_f544316f75ce46b8b0ab3b2c9a92c63d.pdf
    • https://static.usrfiles.com/ugd/b8c837_acbe67c5670a45ecb7dbe5837abaf431.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_off00005f4b.bin
179a0685d51bf1e7276847a9ade228509e5e5f19a31bc74c69f501b527e37285
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 5012 bytes
font_01_sfnt_off00007043.bin
f37cfee64413868417107a406dc1072c4850d0f7a93ba88230352b07593062ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 10276 bytes