Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bad3d5ca596ef4…

MALICIOUS

PDF

143.4 KB Created: 2020-09-07 22:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d787b6b0925ab2ed68021bef102dd72 SHA-1: 96dee225b02ff9c62cb1dd042df9d464552dd91a SHA-256: 67bad3d5ca596ef49755f939b65d8966e9a1ca3d8a6a09f69bb79a228aab312b
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to a malicious domain, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=wound+infection+antibiotic+guidelines', which is likely intended to trick users into clicking it. The presence of numerous other links suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.club/pify?keyword=wound+infection+antibiotic+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/6561/5003/files/volurasonatoti.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/54613261574.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/lekovilevajewimog.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/automatic_transmission_files.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/79219341727.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/56698098330.pdf
    • https://cdn.shopify.com/s/files/1/0467/5813/3923/files/kubota_operators_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7961/3081/files/math_worksheets_addition_with_regrouping.pdf
    • https://cdn.shopify.com/s/files/1/0440/3603/0614/files/alagey_alagey_album_video_song_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/3221261819.pdf
    • https://static.usrfiles.com/ugd/822ecd_aac2c410f4594c8dac76e5ab615316ea.pdf
    • https://static.usrfiles.com/ugd/6d59ab_51a50d188b9b4ae08bdb0bc4124f9b0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9611631e2c47a1bae29aa0f52696d1.pdf
    • https://static.usrfiles.com/ugd/9c0842_fc1b029cd1804eb6b057a186c0bba598.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_cc5d91186f16485bbcd1d076e2bb71fc.pdf
    • https://static.usrfiles.com/ugd/ab0441_9948261491ba4faaa75325c4a7718e73.pdf
    • https://static.usrfiles.com/ugd/a72fa8_32e15eb52d06424b82fd41b810ebcff4.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_off0001f105.bin
ce2eb35c0586f22bd8e03c7c9bbdb073b8477a9d86dfea6d1d2cd2d64b1bd107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F105 5248 bytes
font_01_sfnt_off00020303.bin
a7de17b5111b4dd0d158bedf8b97a34c2eebaa557b3364a8e0b2bc018f884dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20303 13980 bytes

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