Malicious PDF — malware analysis report

Static analysis result for SHA-256 664cca6290daa1be…

MALICIOUS

PDF

92.4 KB Created: 2020-08-12 12:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed25d72f65f7607a6e0880f5e9e1da8 SHA-1: 1f3b286f8544b66df8a5bb49742263e11b93fa03 SHA-256: 664cca6290daa1be693cc0d01760b97ec6d143ab369d2b09c23bc335f8e22f8a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'google drive'. The presence of a password archive lure heuristic suggests the document is part of a multi-stage attack, likely to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=al+final+mueren+los+dos+pdf+google+drive
    • http://piruwozi.thesarahenni.com/uploads/1/3/0/7/130776031/6f4b6.pdf
    • http://files.informationsystemdynamics.net/uploads/1/3/1/1/131163872/1795436.pdf
    • http://febosum.tesorinoeq.com/uploads/1/3/1/1/131164250/da27dc6d908.pdf
    • http://files.olivetgroup.com/uploads/1/3/0/7/130740429/pobaxanu_norixujubawujud_nediwewina.pdf
    • http://files.ridertransformation.com/uploads/1/3/1/1/131163867/d77f4859ab0bdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/vudapupigixenila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/loluw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/caching_strategies_explained_hazelcast.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/94976302046.pdf
    • https://cdn.shopify.com/s/files/1/0433/4229/9295/files/32458468530.pdf
    • https://cdn.shopify.com/s/files/1/0448/1590/9026/files/false_cognates_english_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/40563234069.pdf
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/air_conditioning_and_refrigeration_repair.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/93871594972.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/povebaja.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_off0001278b.bin
652c9d52ba06908f3d838555cf88b14dc8a2ebc9d052aecb451e6d22c6e8c60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1278B 5412 bytes
font_01_sfnt_off000139dd.bin
a7ab3284e03bb2696a22680fc36baf33aedfa503c888fa8a3a0fa0a45d2cf28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139DD 12620 bytes

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