Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e545d0daa0d1b6b…

MALICIOUS

PDF

44.7 KB Created: 2020-07-30 01:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37f5b0821b2e6ffe38f289168e02f7fd SHA-1: b58523a6dbf93d2a66a6740652b9a8c542872825 SHA-256: 6e545d0daa0d1b6b7461ce24e48fd3498f511c7f1b24d4e3a71fa10d48f9bff7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. This suggests the document is designed to act as a link farm, directing users to potentially harmful websites. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this is a malicious document intended for user redirection.

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/pify?keyword=anemia+of+inflammation+and+chronic+disease+pdf
    • http://files.virtualpowerplants.ca/uploads/1/3/2/6/132696018/5d284.pdf
    • http://files.apollobatonrouge.com/uploads/1/3/1/4/131454355/750ac2.pdf
    • http://files.gantshillurc.co.uk/uploads/1/3/1/6/131637649/3173850.pdf
    • http://files.khloenoelle.com/uploads/1/3/1/0/131070712/tateru.pdf
    • http://files.twentysomethingissues.com/uploads/1/3/2/6/132681209/8476d4085.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4145/5256/files/2513149450.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/menejarigowetewanina.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/15149115621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/65807483228.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/91334732844.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/wivuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/fomupiwizikujuziloxogut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/beregunevizojisoxovitine.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/bagavivexunoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/37838575692.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/35006368452.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_off00007209.bin
32f48a1876815b763bc6c94c4176059fffa1d2de5dbd8fa4e5c0cc7c0d708926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 5172 bytes
font_01_sfnt_off00008369.bin
fd4d0814b55a11570652836c021f996e2d0006ac23c020068ae12891adf587f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8369 10004 bytes

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