Malicious PDF — malware analysis report

Static analysis result for SHA-256 278d76913e11231f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-27 14:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba69db138a31df8fee51381b6509476 SHA-1: f3993b521064aa7cf67e6fd9d9599b963fdd4c1b SHA-256: 278d76913e11231f12f0746fe428630d68a14dc54ea483886755dbe63c5f7a16
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.ru, which is disguised as a workbook. The document body, though heavily obfuscated, contains the same URL and references to a 'panic attacks workbook'. The presence of numerous links to Shopify-hosted PDFs suggests a link farm or SEO poisoning attempt to increase visibility.

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.ru/pify?keyword=panic+attacks+workbook+david+carbone
    • http://dakifuto.charlarae.com/uploads/1/3/0/9/130968961/00d1fb8f6e33.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/lerigavifisunewusuzimepef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/wavalezoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/56597513356.pdf
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/31178017989.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/geneku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/napomixosokukura.pdf
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/pokoluzes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/ribisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/21546637955.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/8430468489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/xaxolebilitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/70009475292.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_off0000486d.bin
f367edb7808533fec45ecbf2fe504957802b4c96e667192fa8ec580d5be5a100
pdf-font-stream PDF embedded font (sfnt) at offset 0x486D 5256 bytes
font_01_sfnt_off00005a69.bin
68e8dc5cfb95d85f1f50642fcef44962ac7d859f48536f3b843e0dd892f3f66d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 9556 bytes