Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d273837d6ef4f16…

MALICIOUS

PDF

37.1 KB Created: 2020-08-23 00:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71547475d7181d2a212424faefddebc SHA-1: 236e68a02b76a7016449abb71dc93a3bf59a0851 SHA-256: 0d273837d6ef4f16857e4ffcab02f1ec33bed3ca7ebad19a2646b1d9f8d24295
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a product manual. The ML classifier also strongly indicated 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.ru/pify?keyword=braun+combimax+750+food+processor+manual
    • http://logado.pmrayworlds.com/uploads/1/3/1/6/131607163/6868711.pdf
    • http://files.balancedlifek9.com/uploads/1/3/0/7/130776033/powopusanigivipep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/52235926049.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/52917956590.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/burger_and_lobster_london_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/lezobodizajiximani.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/12396666076.pdf
    • https://cdn.shopify.com/s/files/1/0462/1539/7530/files/logo_intro_after_effects_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/61350416494.pdf
    • https://cdn.shopify.com/s/files/1/0449/1676/8923/files/rhetoric_logic_and_argumentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/74839484065.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/93425294433.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/amarakosha_sanskrit_book.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_off00005162.bin
0a7e53ba73060a88946e734f7d47ce3f08e7bc68b138a4c62c7d5374c9181253
pdf-font-stream PDF embedded font (sfnt) at offset 0x5162 5904 bytes
font_01_sfnt_off0000656b.bin
6916b53a506a6215d6b5340e4e2db1d3f94656386cbceca37a02a7f1be8cbf04
pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 9980 bytes