Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd8c2b8de41ba74…

MALICIOUS

PDF

52.4 KB Created: 2020-08-31 02:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b3eb0e8077fae8575035c42ec10fb6f SHA-1: c688d6e875b85c1adc180a3843e54acf2d56726d SHA-256: 5bd8c2b8de41ba74af59c7c90c2692583de4fe02c3ffa8fcbc76ee7ce354fedc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=python+spirit+symptoms', which is likely used for SEO poisoning or phishing. While no scripts were extracted, the PDF structure and link farm suggest an attempt to drive traffic to malicious or deceptive content.

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=python+spirit+symptoms
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdf
    • https://static.usrfiles.com/ugd/12dc78_ba26325166854c3a9813ed92112dfd31.pdf
    • https://static.usrfiles.com/ugd/289c5e_cdb61fbf72d2458f831cb48e3216b870.pdf
    • https://static.usrfiles.com/ugd/221f3a_595bfae097dd417ab7d9d1fba82dc6b0.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/70516721944.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/zip_codes_longitude_latitude.pdf
    • https://cdn.shopify.com/s/files/1/0435/5856/8097/files/vudesazugoxelajezam.pdf
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/22743650388.pdf
    • https://cdn.shopify.com/s/files/1/0436/0162/5252/files/35699216983.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/scarlett_2i4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/95982037062.pdf
    • https://static.usrfiles.com/ugd/963627_61d58642f85e400daf5407de02bd55a5.pdf
    • https://static.usrfiles.com/ugd/a467d2_2d3cf9e5340a422788627e2415126804.pdf
    • https://static.usrfiles.com/ugd/47b1e8_999cb90d8573489abdefd278ecacc143.pdf
    • https://static.usrfiles.com/ugd/33c377_31b82ea135b44dfa8181ac312c78b165.pdf
    • https://static.usrfiles.com/ugd/909b15_58c61c865ab04df7aa3041de58b91091.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_off000090a7.bin
cc91476607449e6488985eee008fa0117f228d574adc7e709e994114943c6ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A7 4920 bytes
font_01_sfnt_off0000a138.bin
5239d851ef40b78cdcba25dae3ae79ceb3e08ffdbc83b087378ba65ae7579abd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA138 10352 bytes