Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1fb49c49f1f352…

MALICIOUS

PDF

54.7 KB Created: 2020-08-06 23:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3944ed9020e7ec61518b17a9ffef4f75 SHA-1: 6e47d3dbe7c6f754a4da68e6400b03552ebddb19 SHA-256: 8e1fb49c49f1f352ce42c55fd8def4aed8ed2942ea9c6c8140ecf3d059b5c0ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=caballero+de+oriente+y+occidente+pdf. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content. 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=caballero+de+oriente+y+occidente+pdf
    • http://bomilekul.guildofoccultsciences.org/uploads/1/3/2/6/132696414/3884375.pdf
    • http://wuram.kennethvisionmedia.com/uploads/1/3/2/8/132815028/simerulekiziwiju.pdf
    • http://files.carmenkhan.com/uploads/1/3/1/3/131380739/9bf91b0b.pdf
    • http://files.rpglayout.com/uploads/1/3/0/8/130874317/8654128.pdf
    • http://files.georgetownfoodland.com/uploads/1/3/0/7/130775310/2994498.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/zokabesapukipotemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/31794385484.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/7399140989.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/49463351047.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/59574437893.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/anganwadi_supervisor_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/causes_and_effects_of_unemployment_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/12944154346.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/vosuboragawowusofonataz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/77494356969.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ace.bin
fceacd367a210b0ab68db571db8b56dae5446f03bfd3fd36b458e2c44c822cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACE 5024 bytes
font_01_sfnt_off00009bfa.bin
1b71d719bccbe421b218ad7edb57e73eb38e933208087514956a1f2a8cbed585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFA 10872 bytes
font_02_sfnt_off0000bf87.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF87 4324 bytes

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