Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f4626baa49156e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 02:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d8f4f9b5167604f5187d98b3e072746 SHA-1: 5b1ccc8512133b299b5a7d46c6f54962aca2b5e2 SHA-256: 67f4626baa49156ec2198fe5d4f825778811d9bfa8e6f040f4520a1c1dd30fc2
154 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified as a redirector at 'https://ttraff.com/pify?keyword=make+3d+printing+projects+pdf'. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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=make+3d+printing+projects+pdf
    • http://files.monikamdesign.net/uploads/1/3/1/3/131382330/4e5592f11835b3.pdf
    • http://files.savvy-logistics.net/uploads/1/3/0/7/130740464/be135209.pdf
    • http://likal.konzacoffeecompany.com/uploads/1/3/2/6/132682076/wevetemajari.pdf
    • http://files.artworkbyrachelsellars.com/uploads/1/3/0/8/130874359/wokit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/14195048981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/hampton_bay_ceiling_fan_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95610310087.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9494/files/binary_search_tree_iterator.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/65979048668.pdf
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/1337019929.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/44329528280.pdf
    • https://cdn.shopify.com/s/files/1/0443/9500/4070/files/caffeine_mechanism_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0440/4019/2150/files/principles_of_modern_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/gejubiduzikiwodafozapapub.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/reason_5_license_number.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/bsc_physics_honours_book.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_off000065ed.bin
867b3aee281fbcdf7f09484a5681a54426ffdaa733c36c6aead77cf0b6c1ee98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65ED 5600 bytes
font_01_sfnt_off00007922.bin
b6c0d333132f3d2b5c0596a001b8ffddcc942a7884cc203cd6c13875d944cfbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 10400 bytes

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