Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e1542ca6f3ebb4…

MALICIOUS

PDF

50.5 KB Created: 2020-08-21 21:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f1cfdcde5e34c5dfe9284fd9c21449 SHA-1: 53228898fe40eba79e2ccd81d98f4bb0ae98470b SHA-256: 39e1542ca6f3ebb49f4eca0812973a38a44cced3eee217f5557de1b243a5291f
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on ttraff.ru, which is flagged as malicious. The document body, though heavily obfuscated, contains the text 'Probation officer report sample' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm technique used to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=probation+officer+report+sample
    • http://limuku.dylanbeddow.com/uploads/1/3/0/7/130740025/6473540.pdf
    • http://files.bearcreekcommunity.com/uploads/1/3/1/4/131406412/1651112.pdf
    • http://files.urbanstreamecology.org/uploads/1/3/2/3/132303374/b38ce9ea.pdf
    • http://files.suicidalflower.com/uploads/1/3/0/9/130969386/buzetuvapifa-fizikedafepizi-puvawuno-xotowazaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/84016103899.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/45993225793.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/27371708691.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/physiologie_appareil_respiratoire.pdf
    • https://cdn.shopify.com/s/files/1/0447/3955/9578/files/bully_performance_natural_dog_food_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/48954135387.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/satikajuserap.pdf
    • https://cdn.shopify.com/s/files/1/0449/8338/6280/files/heart_barracuda_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/fovusuvajebuditaras.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_off00008924.bin
c30cd8b9750fd685f5acabe0f922481558135946964f39b500e1a8c2169c2825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8924 5300 bytes
font_01_sfnt_off00009b11.bin
f0409426df9c05ba0e99fc0ddd57ea7f104fc0611fcadc1cb7a7fb532b9b2822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B11 10008 bytes

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