Malicious PDF — malware analysis report

Static analysis result for SHA-256 5188e3a43c996a62…

MALICIOUS

PDF

36.2 KB Created: 2020-08-11 20:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3fedd9a8fd84c39b299093d5081a995 SHA-1: df8130e60678f6dde6303cbc78094a8f793c3461 SHA-256: 5188e3a43c996a6247d178e5a8c9d73e1dcfaa086639769b190f57df4215dde9
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is part of a link farm, likely intended to deceive users into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=manual+on+descriptive+analysis+testing+for+sensory+evaluation+pdf
    • http://juluxupi.godsgapnetwork.org/uploads/1/3/1/6/131606490/terow.pdf
    • http://dugis.wissamsouss.com/uploads/1/3/1/4/131438572/limaruwurasiji.pdf
    • http://files.inquireatsmdc.com/uploads/1/3/0/8/130814459/rovakiluxetof.pdf
    • http://daxenevez.online-workouts.com/uploads/1/3/1/3/131380999/bivagewexewimoroxede.pdf
    • http://files.connectorofpeople.com/uploads/1/3/1/4/131482886/lalibiretedag.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/nevijoxirananupos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/xopusifusivatabale.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/2096981314.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/cambridge_english_advanced_practice_tests_with_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/pigikesuduzobewesof.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/karetemuwamozekixumon.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/2817_windridge_drive_acworth_ga_30102.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/25782410297.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufalelavajukunegaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/28699736256.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/23179663901.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/17300007508.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/alkaline_plant_based_diet_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/0639/8364/files/xitodinoralegerilepel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/61847973933.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_off00004d14.bin
a9f6864ea1e5663ffc45490e481e077477a00763ac98631549bf71db29eb6ea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D14 5488 bytes
font_01_sfnt_off00005fe4.bin
a80abf3b67a6b50a05b68f1b3a289248155e85e0eeb6b641f182e6016b9f0cef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 10280 bytes