Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd4d300a157c756…

MALICIOUS

PDF

45.6 KB Created: 2020-08-18 13:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcafae77f3132ccf2fc64853d32e64cc SHA-1: d2aec2789a934fc9d05cfdf7946096fa9a1df132 SHA-256: 6fd4d300a157c756ee49c926433f0c234f325308be11fae6b20dcaae2c31bd41
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially corrupted, includes the URL and text related to 'Android TV box applications', indicating a lure. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary malicious activity is the redirection to the identified malicious URL.

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=las+mejores+aplicaciones+para+android+tv+box
    • http://files.imatadbitoff.com/uploads/1/3/1/4/131437615/sinitivevu_jusurabofa_kabivogu_jezovojodomeka.pdf
    • http://files.stalbanthemartyrhull.com/uploads/1/3/1/3/131398059/napakeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/minotuzukudisom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8753/files/2481792642.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/a_brief_history_of_neoliberalism_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/case_in_point_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/56904745491.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/16737658559.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/detadenutosasif.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/99733241435.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/naturosumevomunivolar.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/33059757063.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_off000066d2.bin
fb69ba4db9e928c0a4cac71edb1e6ddaca526b5cd1fcf71d30715c127805e833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 5504 bytes
font_01_sfnt_off00007977.bin
68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 1796 bytes
font_02_sfnt_off00008202.bin
46b44b2ac6a983fb15ec7d2fd1d271173c2b6fa6aac59d5aea884ae3395162d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8202 11532 bytes

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