Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce83bd7f81ff99c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-22 02:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6813603a949fdda0963e9be6ac72b6f SHA-1: fedda8d63145010751ac2c893251886d86d4f467 SHA-256: dce83bd7f81ff99c354e0eca05d66adb2647731d3bbcaa148e9a036e8423faa4
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', which is flagged as a malicious redirector. The document body also contains the same search query, indicating a lure to trick users into clicking the malicious link. The presence of numerous other links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content. No scripts were extracted, limiting the analysis to the document's content and embedded links.

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/pify?keyword=app+store+for+windows+7+professional
    • http://vifomajo.yonahayin.com/uploads/1/3/2/7/132740519/cc14004.pdf
    • http://todivi.wirraparinga.com/uploads/1/3/1/8/131857758/73c2ad7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/wernicke_s_aphasia.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/vepujubuduxazixubejewaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/91505526521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34292265756.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/fedidolobuditilof.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/raag_bhairav_alap_notation.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/final_fantasy_15_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/reiki_zen_meditation_music_134.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_off00007176.bin
a958abf9d4dc7e46affd132439f8718b059a1a33259134769a80878a8f03a45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 5196 bytes
font_01_sfnt_off00008343.bin
aca2f0332579d6f9911f8e8c1087f9fac04f8560507e8bce156f22c5b027e0be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 10336 bytes

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