Malicious PDF — malware analysis report

Static analysis result for SHA-256 62950010ad6761f5…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 11:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a037a1bb2058e409f4d917ebcbca12b SHA-1: 8b1cf2970199f01985d4c8b63212c3eabaec290f SHA-256: 62950010ad6761f57418757c60ec98addb79e936d21b283df6331b8d4b4be55d
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/wb?keyword=dialogues%20pour%20apprendre%20le%20francais%20pdf', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document's structure and embedded links suggest it is part of a phishing or spam campaign aiming to drive traffic to malicious sites.

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/wb?keyword=dialogues%20pour%20apprendre%20le%20francais%20pdf
    • http://pulepuj.salononpointsuites.com/uploads/1/3/1/6/131606027/xujinone_wadivawebelada.pdf
    • http://rawuzovik.elcajontowcompany.com/uploads/1/3/0/7/130740145/794856.pdf
    • http://files.appstrategygroup.com/uploads/1/3/2/7/132712080/dadefawiwopiseto.pdf
    • http://tamabobu.therawfoodgirl.com/uploads/1/3/1/3/131380505/guzojolajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/data_analysis_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/equality_act_2020_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0389/files/vopej.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/zugepebezogarax.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/83937195843.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/52607772199.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/99998153934.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/doneburabegexibidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/14588398315.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/29264890732.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/statistical_analysis_of_repeated_measures_data_using_sas_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/8105724118.pdf
    • https://cdn.shopify.com/s/files/1/0431/9602/2933/files/63875868843.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_off000066fc.bin
3c707c566f703ad2c14494ed9cd1d208f665e9b98000d952276fe56b786e7e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 5320 bytes
font_01_sfnt_off00007924.bin
2bd295fbeeb4bd722c11e0618e31bcd398111682c1836bb7c3ef83101355f9e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 15628 bytes

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