Malicious PDF — malware analysis report

Static analysis result for SHA-256 3826ef5965c14274…

MALICIOUS

PDF

46.2 KB Created: 2020-08-03 15:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c9f11976146a65240464f3c5d52ded SHA-1: 82a4d10ef78ca903c3e57da3c180564c34400567 SHA-256: 3826ef5965c142744f2f611a50dd18041e6121f9612958a3dd89ab27588c33e8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings. One of the primary links, https://ttraff.ru/pify?keyword=abrsm+piano+scales+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Abrsm piano scales pdf', suggesting a lure to disguise the malicious intent. 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=abrsm+piano+scales+pdf
    • http://files.andrew-rabb.com/uploads/1/3/0/7/130738741/bf147e8.pdf
    • http://files.neonserwis.pl/uploads/1/3/2/8/132814980/6892455.pdf
    • http://files.speakingaboutautism.com/uploads/1/3/0/7/130740536/3fb2ba7.pdf
    • http://files.carolinacounselingwellness.com/uploads/1/3/0/7/130740166/444cab039.pdf
    • http://files.stringacademy.nl/uploads/1/3/2/6/132696128/tamomibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/fasisowazolibusowigosiboj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/ralulobasulum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/74860706223.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/76787118515.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/paxokatot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/cite_youtube_video_chicago.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/lonozulaxufukopuduse.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2653/files/wimobodajixupeliwefusoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/6142247142.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/94553334569.pdf
    • https://cdn.shopify.com/s/files/1/0437/3010/8577/files/kolugeman.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/23689167995.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_off00006830.bin
5bdd79f3c3dad7f0efec29aa9967a0e8b288adec10edead6c756a4d49b359202
pdf-font-stream PDF embedded font (sfnt) at offset 0x6830 4632 bytes
font_01_sfnt_off00007866.bin
b600e0d692681ac441e8767dd3f5a856d80755da27ec2d1ad68743fafbe83f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 5432 bytes
font_02_sfnt_off00008abc.bin
d7c408c17b69ba392b1d116b70b5c797d276b669ed8a64ca7736a0e6c94769b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABC 9660 bytes