Malicious PDF — malware analysis report

Static analysis result for SHA-256 d696579ee8da6daf…

MALICIOUS

PDF

47.8 KB Created: 2020-08-20 07:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12bdf52ccf5e32f5ecc3354f56c6bf36 SHA-1: 6a8fcb8a21d6faf9812dfa2ba2140389abc6a6d8 SHA-256: d696579ee8da6daf14abaa03df8dab79bfe0cab225073ea6b1898d8a619850f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though corrupted, contains references to 'Alcohol 120 full crack', indicating a lure for pirated software. The PDF also hosts a large number of external links, many pointing to PDFs on Shopify domains, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=alcohol+120+full+crack
    • http://files.sacrp.org/uploads/1/3/1/6/131637257/2222933.pdf
    • http://files.flatheadlakemassage18.com/uploads/1/3/2/7/132740804/sijefedalux_tinasazapilexu_vunovapatefer.pdf
    • http://files.asavorytable.com/uploads/1/3/1/3/131397946/d4e6a80e68432c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/borisav_stankovic_uvela_ruza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0165/files/calendario_diciembre_2020_enero_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/71466643380.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/2010_volkswagen_golf_turbo_diesel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/28657482701.pdf
    • https://cdn.shopify.com/s/files/1/0440/1948/2774/files/99062045096.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/35531621880.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f97.bin
4ee55c53bf84d45dcc93f78f55218d6933943e49d8d75d7d81f9007ef474d6b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 5172 bytes
font_01_sfnt_off0000711b.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x711B 1800 bytes
font_02_sfnt_off000079a9.bin
48bc6df063b00c194522962d0f8e0c28d14bc9833d5d755cdab74a53470ee57c
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 10476 bytes
font_03_sfnt_off00009db2.bin
8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB2 16028 bytes