Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a78a52fc8b23fce…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 14:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1214f6996b71e6e377a7ed5d9258d71d SHA-1: 0b002dfcd79cda835bc4b68c07b1ae675b3f5ffd SHA-256: 7a78a52fc8b23fce098324f1bd67d5475ad95bf73a1e955ec1bce3003e382b53
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to a malicious destination. The document body itself contains garbled text and embedded URLs, reinforcing the malicious intent.

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=cylindre+en+perspective+cavali%25C3%25A8re
    • https://static.usrfiles.com/ugd/b8c837_2e0839b1a2534d9abba6fd66bce1cfb6.pdf
    • https://static.usrfiles.com/ugd/defdb4_4bdf7af4ec144310bf9832860d984710.pdf
    • https://static.usrfiles.com/ugd/b8c837_8725122567ee40dab0aea424436dcdea.pdf
    • https://static.usrfiles.com/ugd/3b47cb_9f52f4d94ba9409c9bd49d29201cdb52.pdf
    • https://static.usrfiles.com/ugd/b8c837_f03b69e2e4bf4873b8fa71e4574ac44e.pdf
    • https://static.usrfiles.com/ugd/ac51ce_3606735637e941cdb0f19898c60d6eaa.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_a71e1a33814a4719861a237e6abbb620.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8ed2b1abe54ebb89ad6e7405b5138e.pdf
    • https://static.usrfiles.com/ugd/45e30f_494c6362a33e40c8983ed36365bbaaea.pdf
    • https://static.usrfiles.com/ugd/cdb50c_29de0279c1984a08b4ff095b831a11a2.pdf
    • https://cdn.shopify.com/s/files/1/0464/5004/9192/files/3d_reader_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/proximate_analysis_of_bitter_leaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8215/files/teaching_english_approaches_methods_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/90825508541.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/73070436672.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_off00005c4a.bin
129b2e5225eb5bc780b713f7cc39ef74419c2a1982db7682e606e99becf51b46
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4A 5276 bytes
font_01_sfnt_off00006e06.bin
cdcfe0766937a892fc16bdcfcdbd36895d0da26a7345cc53fc57bb2a53a16aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 12024 bytes