Malicious PDF — malware analysis report

Static analysis result for SHA-256 1986231484d00873…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 08:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31353b5d4fd360380e1897dc44af9f85 SHA-1: bbb74025f75636581048abf6308e37e944e9adcd SHA-256: 1986231484d008734e96ec4a8cea511cf1c769b67ddff7e7b5f202fa9eb08322
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.ru/wb?keyword=rangila%20rasul%20pdf as malicious. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful 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.ru/wb?keyword=rangila%20rasul%20pdf
    • http://files.wissamsouss.com/uploads/1/3/1/8/131856134/guxazader-vemefobajumi.pdf
    • http://files.flightinstructorpro.com/uploads/1/3/2/7/132710678/9dbc6bfd67bd.pdf
    • http://files.maxluxeminklashes.com/uploads/1/3/0/9/130969231/veponipomakiraweju.pdf
    • http://files.themoderndoublebass.org.uk/uploads/1/3/1/3/131379894/4169694.pdf
    • http://files.leggingsusaonline.com/uploads/1/3/0/8/130813851/nuviraza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/histoire_du_canal_de_suez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/naruto_the_last_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/panasonic_the_genius_sensor_1250w.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/18671167785.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/kenifij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/85168396142.pdf
    • https://cdn.shopify.com/s/files/1/0444/6869/9303/files/speaking_in_tongues_books.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/convert_remote_control_ceiling_fan_to_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/99920367068.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/jajizokiwobupefujebakifo.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_off000073dc.bin
1073abc9fc671db2f6dc538ae530ae060a0899218c9b9bf4b4ebda92e328ca52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 5216 bytes
font_01_sfnt_off000085b3.bin
c2ac5a81e2a5cfa3c150fe76ac73fb937a2bf0d71b313e81ad1bb3c1b32b38d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B3 10220 bytes
font_02_sfnt_off0000a8d5.bin
e34dd5ee0980fe9eef678464ba4b605723b0ca6a970f7cce958e55fb9041e17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D5 2984 bytes

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