Malicious PDF — malware analysis report

Static analysis result for SHA-256 f343c5b5137d04e1…

MALICIOUS

PDF

68.0 KB Created: 2020-08-13 21:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d042d93e6ed245f2dc843200a0872e51 SHA-1: e48157617593c8fb73ea34a52c8bd34f68bad9bc SHA-256: f343c5b5137d04e1975900ad6c9b19a449f6572865591d2f0ef74710412dad61
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is likely intended to trick the user into clicking it. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger link farm designed to attract traffic.

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.cc/pify?keyword=spider+man+game+ps4+trophy+guide
    • http://files.bemedialiterate.com/uploads/1/3/0/7/130775665/pudisase.pdf
    • http://jekefan.theartspasf.com/uploads/1/3/1/0/131069934/1804449.pdf
    • http://files.srsm.org/uploads/1/3/2/6/132696029/5841345.pdf
    • http://files.tailwagmarketing.com/uploads/1/3/1/3/131398279/45cfe2926.pdf
    • http://files.eastsidechurchofchrist.us/uploads/1/3/0/8/130874205/zijazem-xovupowajurulo-wetupejikuvogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/wojelesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/expected_utility_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/91828402394.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/64037817613.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/suteluluwokobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0448/0227/7542/files/43099157713.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/43344519514.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/46660199204.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/biology_class_10th.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/baixar_do_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/98672736122.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/jofirolesikusupobareze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/polaris_trailblazer_250.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/
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/6403

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d8.bin
c90946a8ced50d10065dc5361ea2fd052570bcb75ade98bb226c1cfd95ca1035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 5636 bytes
font_01_sfnt_off0000dbdc.bin
a7a113238c5a2df95fb15940272153b491126eb01e14756f3d9f95cf714bf764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 11340 bytes

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