Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef7043bef9a81be…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 15:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf877f592ca8176acad8165416a4f9d SHA-1: 8e62638400d991b7e69ca67c432acf79a5e8cd40 SHA-256: 7ef7043bef9a81bea1e0918227630b9892d98dc4b958e64621a51193d35a25dd
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, ttraff.cc, disguised as a pharmacology PDF. It also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.cc/pify?keyword=absorcion+farmacologia+pdf
    • http://vasope.rootsnutritionmassage.com/uploads/1/3/0/8/130814124/lezusepudeneki_xawobenumona_gukafetumida.pdf
    • http://files.nc-zeitgeist-foundation.org/uploads/1/3/1/4/131438539/visabata.pdf
    • http://diwafep.jennscookiecreations.com/uploads/1/3/0/9/130969945/2111587.pdf
    • http://files.pa3rdgrade.com/uploads/1/3/2/6/132681861/zupuzuverevizuw.pdf
    • http://files.davidprossow.com/uploads/1/3/0/9/130969604/ramobimevafelo-jipom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7115/1007/files/equations_with_algebraic_fractions.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/total_gym_platinum_plus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/5016871227.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/98111204638.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1014/files/92018289195.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/67361617104.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/5708073770.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/blank_biodata_form_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/73678871734.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/informatica_tutorial_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/8301526171.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_off00006803.bin
e5dbfd1776a5dedd0f1ec72da8288859ad26adf7bea6d3b83308854eb2fa47d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 5604 bytes
font_01_sfnt_off00007adc.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 1936 bytes
font_02_sfnt_off0000841f.bin
cd764f5c39b074c9e963d70e71fc4779944afe9ba9fe4c66bf70e8b09d5adf69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841F 10396 bytes

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