Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c741bcfddf68f92…

MALICIOUS

PDF

48.2 KB Created: 2020-09-01 05:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc856d1dad8f8e2596d6d3ccac14dc1a SHA-1: 1d2bd93ba8d9193eb70f73b3a0ce1fba81fcbbfb SHA-256: 5c741bcfddf68f928fd5959bd2e12699dad78bba4e6b9d07ec2c8dcefb16c858
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=agribusiness+financial+management+pdf'. Additionally, it features a PDF link farm heuristic, indicating an attempt to generate traffic or SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attempt.

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=agribusiness+financial+management+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/duzakebabarinilafeter.pdf
    • https://cdn.shopify.com/s/files/1/0439/3077/9816/files/opportunity_cost_graph.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/44381758848.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/muzepesadebojifumuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/47635342414.pdf
    • https://cdn.shopify.com/s/files/1/0428/2505/6412/files/a_level_physics_waves_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/33283914237.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/22335274234.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/fokafurevozilexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/solar_battery_charger_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/mawigutilabisowezaxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/35033778856.pdf
    • https://static.usrfiles.com/ugd/12daa7_6af462ab97bb4257b9430787060d156f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/5bb01c_29a8bca2d8dd4f49a1466d241016b867.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006415.bin
47fd20768f4b71132c6cf27c2c8b45426841276c55eb6321f072f00f53b69541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 5376 bytes
font_01_sfnt_off0000763e.bin
b574da4c378b41ed03c4b6e68c42ae6380d623045cff46d0a74fe72370ad6621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 15056 bytes
font_02_sfnt_off0000a511.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA511 4324 bytes

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