Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e85ed6ba2e270b…

MALICIOUS

PDF

57.8 KB Created: 2020-08-29 12:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7d09db45d73ffa7c5583ff74054ef43 SHA-1: 62aa7be3f2273472736bb69a24fc77424d3e5965 SHA-256: 14e85ed6ba2e270b6ecc66c88da5ef4e0b5821cd0c09369d1cdb9afdb4ace359
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru). The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites.

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.ru/wix?keyword=caged+system+minor+chords+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/mediacom_bluetooth_usb_driver.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5521/files/45701003893.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/forex_auto_trading_robot_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/biodata_format_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0a6355140284d5ea78165582bcba1ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_45596a660d2d478ab33f6b427a3f0e8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_91508e7358304576842ae55e365186eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_531bfd49a313432182eb865a40269856.pdf
    • https://static.usrfiles.com/ugd/b8c837_be214fdb81eb4cc782021535ec47c022.pdf
    • https://static.usrfiles.com/ugd/b8c837_b524e3e52823497fb1243a0ed86b36d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66acebd9c5a44d2b41c188da780c883.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/zarabelusaxofibudisapuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/91185426550.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/44191960555.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/protestant_center_of_reformation_eu4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009581.bin
6afe93b99c6457b5c85bc65db1c4a5f5759374e124a5e265f7576c86d532beb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9581 5448 bytes
font_01_sfnt_off0000a7e6.bin
1bddf2f41a58d35f7cf8bfb5e0b66d740401285b6d1831d9e5f6a9fb0b1c77f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E6 10812 bytes
font_02_sfnt_off0000cc6f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6F 4324 bytes

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