Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b2295179650c49…

MALICIOUS

PDF

62.3 KB Created: 2020-08-04 08:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a001b3d25f3ac78de9da1cd5f3202f8e SHA-1: 71f445002ca48baaa48b53ca41ba88c91b59581b SHA-256: 52b2295179650c498188217c982113517494dca78486c7455d8a4aa1bdac0aac
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains numerous embedded URLs, including a primary malicious redirector at 'https://ttraff.ru/pify?keyword=sources+of+carotenoids+pdf'. This suggests the document's purpose is to lure users into clicking these links, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sources+of+carotenoids+pdf
    • http://toraneno.wandlevalleyforum.org/uploads/1/3/1/6/131636948/risudofidakemu_nururelugar_gugoxufozub_fikimefapem.pdf
    • http://files.islandhillfarm.ca/uploads/1/3/0/8/130813643/9566384b.pdf
    • http://files.sndcdallas.org/uploads/1/3/1/3/131398134/bonawusanewitubud.pdf
    • https://cdn.shopify.com/s/files/1/0438/3647/3501/files/dometic_brisk_air_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/98091236380.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4210/files/6602546915.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/lelajojugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/runojasaniwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/41661458427.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/62246931798.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/bpsc_pt_exam_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0449/5595/9464/files/bharat_ki_nadiya_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/6062/5562/files/vademulunawiledapekek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/24788219367.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/class_11_cbse_biology_textbook.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_off0000a80a.bin
0f19c23cd5b39b087640d9f5bd956c3566601d2d7d3d72f14a128a0981ba1df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA80A 5220 bytes
font_01_sfnt_off0000b9dc.bin
b9827bdfa56b83f876bc173eb6e9d6cd7cf0633cec3b6a5555f904c6a2e95c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DC 15940 bytes

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