Malicious PDF — malware analysis report

Static analysis result for SHA-256 0676adbdd8183d4b…

MALICIOUS

PDF

36.1 KB Created: 2020-08-17 08:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488bbf711ec723496510b0d14e5b231f SHA-1: 23d8a409b2e646ec4ba8608929e1e3932d16bce1 SHA-256: 0676adbdd8183d4bfbdf93faa0f8a6c022b9de39ca6dd03437d0b0d498a0ccfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body and embedded links suggest a tactic of creating a link farm to potentially drive traffic to malicious sites, possibly for SEO poisoning or to host further 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=beiimaan+love+video+songs++pagalworld
    • http://files.elizabethbaumanart.com/uploads/1/3/1/6/131607063/2685571.pdf
    • http://files.boquetenewcomers.com/uploads/1/3/0/8/130814057/givifuzu_mivasava.pdf
    • http://wimemu.buckscountywomenschorus.com/uploads/1/3/1/6/131606598/b0456b7d14063.pdf
    • http://files.purelyinbound.com/uploads/1/3/1/3/131398231/kadesukewab.pdf
    • http://sumot.dayummdez.com/uploads/1/3/1/6/131606968/3bebc10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/wobosigodevuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/sepekitebunozogukinagabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/medicine_names_and_uses_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/coleman_fleetwood_pop_up_camper_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/cisco_ccna_lab_workbook_200_125.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/xubigufinubet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/zesedabimulejavupowaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/darius_build_s6.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/jevexanekiwajewat.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e5c.bin
3de0749a28ba30fdde4e0e3d7d09e4d0b8cb5c322d5413e2647f571ae31c5294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E5C 5480 bytes
font_01_sfnt_off000060f9.bin
1cb3f2251b8af6e7df544c50efcec80f66a0bed4ca5b83597e77f96d0bd60255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F9 10264 bytes

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