Malicious PDF — malware analysis report

Static analysis result for SHA-256 670ac9af824a689d…

MALICIOUS

PDF

59.1 KB Created: 2020-08-02 16:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd7abc0eba817fc0b9584b10718f6885 SHA-1: adc9d2d2168322777b9feb10e499e6b0d8a513d0 SHA-256: 670ac9af824a689d82befbf44441916d3781915e7625c5f7487e0ad5229f5b3d
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 one identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of numerous links, including one pointing to a known malicious redirector, suggests an attempt to drive traffic to malicious sites, potentially for phishing or SEO spam.

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=persona+5+how+do+you+train
    • http://files.trovenj.com/uploads/1/3/0/9/130969963/4c6ab3a2b07a3.pdf
    • http://files.winninggodsway.com/uploads/1/3/2/7/132740519/f223560a2.pdf
    • http://files.lesliemartinart.com/uploads/1/3/1/0/131071289/12257.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/34377174367.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0502/files/baguxivemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/81714913643.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/35300847602.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/komizakatiperunitewokapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/lixefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/reruterupodunojeraliz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/vejid.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/laxetopoganafokigalir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/rujanurisilumipan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/46489853378.pdf
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/17631196036.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/30479828051.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_off0000930b.bin
16325fd30e6b05722a22acfbc7eefce8d9d6f14821dcd2a1e46c8d7d194f4617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930B 6792 bytes
font_01_sfnt_off0000aa35.bin
81a4f63491e8008fbc8bd9cf7d3e0a0aeeca25e64e9fea4a0cfad32ac0b61d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA35 5200 bytes
font_02_sfnt_off0000bbf7.bin
c8abd557c9f65af4311c955a7d85893c55831046e02f61cdaac856af93e4a139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF7 10388 bytes

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