Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93f6017c092bebb…

MALICIOUS

PDF

57.5 KB Created: 2020-08-24 16:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c468cec82ff78fbea5a10674df75ebdc SHA-1: 648022afeb620f734187cb1aa23f8fb8a3cb97a4 SHA-256: d93f6017c092bebb72f199dc6d1fdf13594879f9eb5f25fd765e03750d448c9c
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.ru/pify?keyword=concrete+nouns+exercises+with+answers+pdf`. The document body, though heavily obfuscated, contains this URL, indicating a lure to a potentially malicious site. The presence of numerous embedded links, many pointing to benign Shopify URLs but one to a known malicious redirector, suggests a tactic to obscure the malicious destination among legitimate ones.

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=concrete+nouns+exercises+with+answers+pdf
    • http://files.pjclakes.com/uploads/1/3/0/8/130814237/4ecd6872a518.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/2016_gmc_acadia_denali_manual.pdf
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/75973531128.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/parubisudojixajawozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/68569754208.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/49208498820.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/99709556719.pdf
    • https://cdn.shopify.com/s/files/1/0443/6243/2668/files/careless_whisper_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/hyperbole_worksheets_for_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/papierformat_a3_in_usa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000948c.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x948C 2828 bytes
font_01_sfnt_off00009e87.bin
1cb1df2d328a499b5b6a41badda7c6a688c8c0977c0ae9f4c59454a73c097e84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E87 5276 bytes
font_02_sfnt_off0000b086.bin
88f9763c922fe748c4f990521820e53b39290bd89cc44c827cbef488e0bd585b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB086 12728 bytes

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