Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dae8233b6b6a3e4…

MALICIOUS

PDF

59.7 KB Created: 2020-08-24 20:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1551666fec6f5bd9cf03bcb26d2ac94a SHA-1: da2592b53bd20a6d41bfc9a2de93c52042fe1475 SHA-256: 1dae8233b6b6a3e4455f77c93eb40b9af73279aea5267a03967d9983469f2806
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a malicious redirector at 'ttraff.com', which is designed to lure users into clicking further. The document body, though heavily obfuscated, contains the same redirector URL and a list of other URLs, suggesting a content-luring or SEO-poisoning tactic to drive traffic to malicious sites. No scripts were extracted from this sample.

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=chinese+action+movies+with+english+subtitles
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8992/7067/files/85770776420.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/73175121656.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/56648313220.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/status_asthmaticus_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/53583090893.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/mesaxusovamilawugizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/28348820132.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/93798404688.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/80342637247.pdf
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/14026177277.pdf
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/wemaminoxotodafogufutani.pdf
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/83445290275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.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/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d64.bin
20728a498d89e526f4d7f17605dee7ab99ceef41ea28f72d772c9bb1cedb9ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D64 10060 bytes
font_01_sfnt_off00007e6c.bin
b03e0160fa5944631dfcd16578377bdc8000442540238811c3c03e516fd13991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 5312 bytes
font_02_sfnt_off00009069.bin
925ef043252732527d6c97098be81cc9002d3d25eda7bab9d0bd3c5c634380b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9069 10052 bytes
font_03_sfnt_off0000b305.bin
fe3f44fec4b985ec8262d201839180407fbc699a8a8d552e99cb6f0246c4e4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB305 19012 bytes
font_04_sfnt_off0000d094.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 4324 bytes

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