Malicious PDF — malware analysis report

Static analysis result for SHA-256 0409c85a4ebdcd00…

MALICIOUS

PDF

38.5 KB Created: 2020-08-08 20:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640d9ceaab24ec82ee7cd4195b143afc SHA-1: 31fc6cc123c5d59d425563c48be8861940185e01 SHA-256: 0409c85a4ebdcd00b02c6233fe9ccdbc9d2fdcf978abd6ef1ab6c09a590a40ff
162 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a download for a PDF editor, which is a common lure for phishing or malware distribution. One of the embedded URLs, https://ttraff.ru/pify?keyword=canon+ij+pdf+editor+download, is identified as a malicious redirector, indicating a high likelihood of leading to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=canon+ij+pdf+editor+download
    • http://files.unnatinarang.com/uploads/1/3/1/3/131398333/fovopavik.pdf
    • http://lavad.craigjafferesearch.com/uploads/1/3/1/4/131453850/kivelasokurevit-vojolikutew-fulozile-kukosulufizex.pdf
    • http://losoxujuj.angelaeastwoodphotography.com/uploads/1/3/1/3/131398091/sipokejama_tujaz_dejomabegid.pdf
    • http://files.vitalenergy.life/uploads/1/3/2/3/132302970/nubam-siwogivez-fewukabewalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/ucsc_eduroam_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/34193589750.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/65352167712.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/pdf_xchange_serial.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/16213073463.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/wifupamafipilojukopal.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/database_concepts_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/bewele.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/gogexer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/92657103351.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_off0000594a.bin
6c5d31ef882ff4857e4ec0ffba9dee9e87df8a794ea1a5c2eca397117a43d6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594A 4928 bytes
font_01_sfnt_off00006a32.bin
7891bf72d62b9acf297d785edc2d751fc3a60793582227ca5c3e8534b5fc84d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 10196 bytes

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