Malicious PDF — malware analysis report

Static analysis result for SHA-256 610b013ed012f1e1…

MALICIOUS

PDF

53.5 KB Created: 2020-07-31 17:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb6a7a5c2bfa3ecec0bf5fbc9166021 SHA-1: 8372d1a56dd8a49d54ffa5522982a9d95d6e4775 SHA-256: 610b013ed012f1e1478b20552d39eaf826deca4ce9f22e5e0fcd256b8dc1ad50
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 pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Kodi repositories list 2016' and the malicious URL, suggesting a lure to trick users into visiting malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=kodi+repositories+list+2016
    • http://files.orientation.fis.hk/uploads/1/3/2/3/132303226/gumemeti.pdf
    • http://files.rhetinfo.com/uploads/1/3/0/9/130969298/boxom.pdf
    • http://files.eliteprephawaii.com/uploads/1/3/2/3/132303378/mepevifa-xusuvumetuxul-zajetikinojo.pdf
    • http://files.socceriqeducation.com/uploads/1/3/1/8/131856034/gemokekexa-xajazepibi-zufomobo-mabatubivotozif.pdf
    • http://files.stimuluslanka.com/uploads/1/3/0/7/130776489/xemilusebavuvofop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0437/8142/3262/files/49742482946.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/45796004349.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/kefajumusetebadepiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/fitubavofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/18170464045.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/89140040706.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1083/files/43631241158.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0407/files/dowipiwimowom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/25456781734.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/xotetejap.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_off00009505.bin
f48ab75528a408d9a7e5dd6701a87829b0481b9538ea410f2cbae3e98a2e2176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9505 5192 bytes
font_01_sfnt_off0000a6ca.bin
ccf0586d0907122506298e9454c39890103398ec2e36a5990f44c428280d9426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CA 10084 bytes

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