Malicious PDF — malware analysis report

Static analysis result for SHA-256 931e7ea7c511b1ec…

MALICIOUS

PDF

49.5 KB Created: 2020-08-19 01:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a22ba44ec1fd39d95caa388f687049e SHA-1: 735c82ad5a5b45d65808263295ceca8479a9e6f5 SHA-256: 931e7ea7c511b1ec8ea651f1a9fc7c549c7e235f2d1309e4bd6990468258d6f9
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=genomic+dna+extraction+protocol+phenol+chloroform'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, suggesting a lure to external 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=genomic+dna+extraction+protocol+phenol+chloroform
    • http://jigitux.australianamateurperformercompetition.com/uploads/1/3/1/1/131164250/jepifuzasoralegu.pdf
    • http://disumuvuf.davidstaceyphoto.com/uploads/1/3/0/7/130738909/jerum.pdf
    • http://files.pittsburghdieselkings.com/uploads/1/3/0/9/130969357/taxowepobisopiloboxa.pdf
    • http://norurak.educateart360.com/uploads/1/3/1/6/131637024/wukilusowulozemaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/ruby_file_copy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/874478011.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/40345008733.pdf
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/simpson_s_diversity_index.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/12458147877.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/58157461800.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/14485746890.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/jiretirererigolam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/kenanelokijiroponep.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/advertising_vocabulary_quiz.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_off000075c0.bin
d9bc9aa5d0f26484097914eab5b427dbacd87373d5bac2472af37e813a1f1dd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 5104 bytes
font_01_sfnt_off000086e9.bin
60b68306ba0b2c962c12eefa071c7794f195e923c4cf8456fcfec2204ada50b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E9 10380 bytes
font_02_sfnt_off0000aa29.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA29 4324 bytes