Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaed213f16260a5…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 08:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16041ba3099ccc06c6d870e24e483112 SHA-1: d28946e4ba30db8310ff4b6d56c40648aa754422 SHA-256: 3eaed213f16260a548bf134f6886ff7dec6f89773bb5edae2b4fc0b3043f4d99
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious downloads. No scripts were extracted from this sample.

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=adobe+pdf+reader+for+win+10+download
    • http://files.molokaimiddleschool.com/uploads/1/3/1/6/131606003/juwakifemopakob_minejotur_borili_kavebifori.pdf
    • http://files.karollee.net/uploads/1/3/1/4/131408029/6619650.pdf
    • http://files.tracyainsworth.net/uploads/1/3/1/6/131606798/1662357.pdf
    • http://mawoneda.threeriversbigbookweekend.org/uploads/1/3/1/8/131857315/f79505fe3093.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/53979487819.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/32486645776.pdf
    • https://cdn.shopify.com/s/files/1/0450/8617/9480/files/mobius_aromaticity.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/metebupekosetoderefiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/common_sense_questions_in_urdu_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6921/files/rupawozenugadam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/51554737642.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/86841799585.pdf
    • https://cdn.shopify.com/s/files/1/0443/5614/1212/files/bungie_destiny_2_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/hansel_and_gretel_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/56753745036.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e71.bin
dcdec65c84951738fca1405a90a92204262e40ff20e020f83399b5fb9d7e6d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 4980 bytes
font_01_sfnt_off00007f6f.bin
2048930e09aa4848e29b3a190bb99fbd7bee6b3f91322c9a907fff3e21bad073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 10072 bytes
font_02_sfnt_off0000a1dd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DD 4324 bytes

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