Malicious PDF — malware analysis report

Static analysis result for SHA-256 970fc618d1ece174…

MALICIOUS

PDF

48.3 KB Created: 2020-08-13 22:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a61b8a34c374c132c3c729c3ebde5671 SHA-1: 4b3535cdbf6d8be9ee26c832d02c894cc90472a0 SHA-256: 970fc618d1ece174fe266ad3aba0e28cf249f76caa1d0c93468e1f5d587b562e
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 of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking URLs hosted on Shopify. This suggests a link farm or redirection attack designed to lead users to malicious content.

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=cartesian+coordinate+system+grade+8+pdf
    • http://files.zbfc.org/uploads/1/3/1/4/131411896/jiriku.pdf
    • http://files.bridgettefowlerpoetry.com/uploads/1/3/1/4/131437376/7c50999cb64511.pdf
    • http://files.spawholesaleproducts.com/uploads/1/3/1/8/131856331/mevurobitar.pdf
    • http://files.eframesuk.com/uploads/1/3/1/4/131437423/bevakojas.pdf
    • http://files.bridgettefowlerpoetry.com/uploads/1/3/1/4/131437376/7c50
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/46085478555.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/assembly_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/neet_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/nuvukofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/skyrim_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/filariasis_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/nawebume.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/71860724869.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/13524682021.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/the_carrie_diaries_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/81802354115.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/vexejakezavipetodipin.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/22528967587.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/20182126067.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_off000071d2.bin
8486ab51a4f29b7f9931ea66f1169253615e41a98221c3eb523ea16f21295bed
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5644 bytes
font_01_sfnt_off000084fd.bin
feea072e19fa1b6368f8b5fb5de762cecd027511218ea370a1093ef195a6d600
pdf-font-stream PDF embedded font (sfnt) at offset 0x84FD 15224 bytes