Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64b0838103952a0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 01:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: decbc3d589b7fbf4d6a08abd8729d3cc SHA-1: 646f6b400fcd7323f7b2e0bef7dd0c7deeeb3f3a SHA-256: f64b0838103952a0d3eaacea7a1c3b70e11d11c53f0d34fadeffd0998eda307d
152 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to the presence of numerous embedded links. A critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com', which is likely intended to lure users to malicious content. Additionally, the document contains a large PDF link farm hosted on Shopify, with the primary link pointing to 'cdn.shopify.com/s/files/1/0436/6503/1321/files/kebapiwajuturulagazizomoz.pdf'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=western+colorado+map', reinforcing the malicious intent.

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.com/wix?keyword=western+colorado+map
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/kebapiwajuturulagazizomoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/manual_cadnaa_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/81456234507.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/fepolaziworolig.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/65308570718.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/59265831869.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/vaduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/aneuploidia_y_euploidia.pdf
    • https://static.usrfiles.com/ugd/d3758e_c80c62d658594c288c6ece0748f715b9.pdf
    • https://static.usrfiles.com/ugd/b6edda_18363826b12e43679977eb5fcf191761.pdf
    • https://static.usrfiles.com/ugd/217d68_35bf98d43c9c42e8b5fed44e63869a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_1318525437d04026a36bb8fd533469f4.pdf
    • https://static.usrfiles.com/ugd/efb3f0_573e33cf8c914c2a9ff69b9e5f67344b.pdf
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/455204701.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/76932062452.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/pigexexubosurobigurovevuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/essential_calculus_james_stewart_2nd_edition.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_off000073e3.bin
2e49b2374afa2e6d40a4c096ef934edde91b5fa9aedaaa99625f0f8834cf37af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 5232 bytes
font_01_sfnt_off0000859d.bin
7fdc20a2a7b09cf44203ff9d42b15562284dc636f87244fdff39195941a1d334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859D 10576 bytes

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