Malicious PDF — malware analysis report

Static analysis result for SHA-256 8079c7a30bb59937…

MALICIOUS

PDF

47.4 KB Created: 2020-09-02 17:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38bcf412e7902a1188244a93b3524272 SHA-1: 263955730c79c15b74c82b6b297d8a5d083a9458 SHA-256: 8079c7a30bb59937e50ab8097bd56dbe0f02df8f3b8ffef804cd82263599f71d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including one pointing to `ttraff.cc`, strongly suggests a phishing or malicious redirection attempt. No scripts were extracted from this sample.

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/pify?keyword=arch+tempered+teostra+guide
    • https://static.usrfiles.com/ugd/d54300_a46b1e0cae4d497386589f1c7b40da64.pdf
    • https://static.usrfiles.com/ugd/44b221_b929c7fe7fec42a8b047ba2eeea26fd8.pdf
    • https://static.usrfiles.com/ugd/856cea_db40636c652a4507aae348a0d5af2b96.pdf
    • https://static.usrfiles.com/ugd/37987b_9fd36d695cce40368ef572e3d01b6582.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ff7f1d9d89e4e2789087cad1ca41012.pdf
    • https://static.usrfiles.com/ugd/1849a1_edaf82c2d57d4dfe8804add4c62c37df.pdf
    • https://static.usrfiles.com/ugd/c8a981_2c4b768ebbf6497e83b46ce51dbd7004.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6a3ec104de940039daacf2f0f0ef7af.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_39d2a662c48c44f0b3ac6cbe8fb39066.pdf
    • https://static.usrfiles.com/ugd/93c935_f7e43b91b7564a70bdebb4d1b5194211.pdf
    • https://static.usrfiles.com/ugd/15cd4d_9fd9221c64b547cd9b3d37e8a9f65576.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/the_martyrs_of_karbala.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/76863811440.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/63532034334.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/rupukatiperejiwer.pdf
    • https://cdn.shopify.com/s/files/1/0428/7302/8775/files/berisepano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664b.bin
79298c32c6b74c525c600919232d451c181fffb4c8ce49b319c042a1890bc142
pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 5444 bytes
font_01_sfnt_off000078a3.bin
e31598342cbdfd30fcdf6e1f37564ade7e152116fa128ec33e7bd5006e2325b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 10060 bytes
font_02_sfnt_off00009b52.bin
89b377872ea6d3aab5fb89e918f6000d53c926b8a03a903ff29ca99b36412fcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B52 16160 bytes