Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a05a9cca13b868…

MALICIOUS

PDF

35.5 KB Created: 2020-08-11 09:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071aa6483bd19971f79037a0aba87004 SHA-1: 1935c7992825be61d85e8899f4647bc943287c82 SHA-256: a9a05a9cca13b868c4591fe466ac4fcbab84548ccd25e21c108a007b694fe36e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to redirect users. One of the primary links, 'https://ttraff.ru/pify?keyword=pdf+yasin+sharif', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting an attempt to disguise or obfuscate the malicious intent.

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=pdf+yasin+sharif
    • http://files.nhlogcabinrental.com/uploads/1/3/0/7/130739463/papuwudusu-kizegagare.pdf
    • http://xotusak.rainorshineweddings.com/uploads/1/3/0/7/130739625/ec4d9a0.pdf
    • http://juvavas.techniprodec.com/uploads/1/3/1/4/131438405/wovinilavuvega_makegusupe_wojufijipasese_jerumavivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/a_to_z_dream_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/ipomoea_aquatica.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/78342553718.pdf
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/the_beekeeper_of_aleppo_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4214/2358/files/la_apologia_de_socrates_gredos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/candido_ou_otimismo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/81570632619.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8423/files/variable_frequency_drive_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/60384023974.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_off00004479.bin
d496819b3ad2ff53ae56cffb3d46dba156a1a2fc1a1566b9e4ddde9a549ec53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4479 4548 bytes
font_01_sfnt_off000053bf.bin
d1df7a2559767e450e2ac8664c470a94f4288973e19f57d519d68598f9d06ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BF 9300 bytes
font_02_sfnt_off00007391.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7391 4324 bytes

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