Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4afe39cc3c1b6ef…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 05:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e7c027e7dbdf018e4ab40cfcc82a054 SHA-1: a84cf54b47cea9af3db25d20dfd32cf69f4dc3c5 SHA-256: a4afe39cc3c1b6effdd04fdef5b8f65fd23f6fbef29671f50a6786134a644489
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm designed to manipulate search engine results and redirect users to malicious infrastructure. The primary malicious URL, 'https://ttraff.ru/pify?keyword=automobile+engineering+interview+questions+and+answers+pdf+free+download', is identified as a redirector. The document body, though heavily obfuscated, contains references to the same lure and the malicious URL, reinforcing the social engineering aspect of the attack. No scripts were extracted, limiting the analysis of direct execution capabilities.

Heuristics 3

  • 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.
  • 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=automobile+engineering+interview+questions+and+answers+pdf+free+download
    • http://files.bayoutalla.com/uploads/1/3/2/8/132814276/buvuzi-zizatedesolu-tubevebozo-xizorurupunovu.pdf
    • http://files.wayne-badminton.com/uploads/1/3/1/3/131384359/9068208.pdf
    • http://files.josephwhitewolf.net/uploads/1/3/0/7/130740521/0e8cd7f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/34645331038.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/dabixejogewajavusifapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/susat.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/beketajebekufibodasagazot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/network_topology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/73358512134.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/esl_intermediate_reading_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/92145926781.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/3951519715.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/wilurefom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/votakix.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/sap_mm_blueprint_document.pdf
    • https://cdn.shopify.com/s/files/1/0440/1384/6693/files/nejitatadozutovagef.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_off00007368.bin
0ccca41e7604d69d11979ca6b04381dcc2016e1ae35aaa0843d6b89ee42bf1ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 5768 bytes
font_01_sfnt_off000086ff.bin
40b039543f1c2290af92fe92a793f96a2b871cfa9f9c458bbdc2ed8f440706cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x86FF 10224 bytes