Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf53521984d13e65…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 12:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc2cd06f39d0f53766e559525be0fc44 SHA-1: d8f340e15cb313e78c7643c1796a9994d928f290 SHA-256: cf53521984d13e65ba7a03525d6f43d24f93dfbdf874bcac5e3f54775a90d418
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, suggesting a coordinated effort to drive traffic to malicious sites. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

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=3d+movies+in+tamil+dubbed+free
    • http://geropun.kalenit.com/uploads/1/3/1/6/131607163/kaweso-voden-mokono-jijefofutikolab.pdf
    • http://kugog.theblackwomansocial.com/uploads/1/3/2/8/132814930/noviropufavo-ramiwo.pdf
    • http://files.kidscastleschoolageprogram.com/uploads/1/3/1/4/131407423/f206b3051b426c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevaziretojigadogikoranab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/lewipadawigovodezulivis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/pugatavameda.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/kisah_ashabul_kahfi_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/27381573858.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/banished_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/sentence_fragment_quiz_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/8307744489.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/mekuruxikegewawita.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/6546777676.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_off00004d71.bin
a0f1ed68c8fc7a12087db7e965847ba88c69036049ab15d21ea2a26abc1d581d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D71 5204 bytes
font_01_sfnt_off00005f02.bin
88c503766f54806ba71e2483fb2a8b0aa9eeb3741d81aac8441f18e72835090f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 10352 bytes
font_02_sfnt_off000082ac.bin
83c8ec52143525ac1de2a12eb37e3b0c7a285a7557193c97ef957095f0a788bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 16112 bytes
font_03_sfnt_off0000977e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977E 4324 bytes

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