Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddb806fe80a1024…

MALICIOUS

PDF

54.2 KB Created: 2020-09-11 10:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07ea2808deabdecba279b5e855e5189c SHA-1: ae601e69dac263e5172efe725e244d88268c1368 SHA-256: 3ddb806fe80a1024714848c448ab275d1512389b48b9035e21d32cbdfb80e80e
152 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, pointing to 'ttraff.club'. This URL is likely part of a phishing or malware distribution campaign. The document body also contains this URL and numerous other links to PDF files hosted on 'static.usrfiles.com' and 'cdn.shopify.com', suggesting a link farm or content distribution network used to host malicious or benign lures. The ML classifier strongly indicates maliciousness.

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.club/wix?keyword=catholic+answers+blasphemy+against+the+holy+spirit
    • https://static.usrfiles.com/ugd/b52961_8875c9e7b1134950aacba82897226d70.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_7110f1a5a06d4c4b8fdfc80bb9006b7e.pdf
    • https://static.usrfiles.com/ugd/078c79_15f91f98a1774c63ae6264294e71dc2c.pdf
    • https://static.usrfiles.com/ugd/23924c_5dd3371a0bcb4900bf16e3c9011b4287.pdf
    • https://static.usrfiles.com/ugd/77eba6_e57378ac821c45afa91a4f55f277eae5.pdf
    • https://cdn.shopify.com/s/files/1/0463/3385/3852/files/64806864101.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/6752044379.pdf
    • https://cdn.shopify.com/s/files/1/0435/9903/6573/files/96149036300.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/palirekabukozajuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/tudalikuruwezuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/31939688887.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/80220308419.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/volixavunujapudazopegi.pdf
    • https://static.usrfiles.com/ugd/07ef24_35b463e17338404690f43ba0be242fd3.pdf
    • https://static.usrfiles.com/ugd/c0b427_9d2046e5ba154fa09152fc6cfae89453.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9949b50c03744fc9e4eac8629827ea3.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_off0000945b.bin
f3c015ccb61d7d10ec35ecd66466a1172405d6f2759dadf2840d3981d3e650ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 5584 bytes
font_01_sfnt_off0000a742.bin
a26a5a5ef3d575e1882b48f541942057b5d34944c7b4e9714e591d9983d3ef92
pdf-font-stream PDF embedded font (sfnt) at offset 0xA742 10512 bytes