Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b664fcf48744bb…

MALICIOUS

PDF

51.4 KB Created: 2020-08-19 12:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe0215afc9f6baca8c35d8f18177430 SHA-1: b9c87d93f4a2759780775dd15d8157614dfa5b78 SHA-256: 10b664fcf48744bb2e4415f7c52e8728eaff02f1f4f9a0754da398336a889f67
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure for software downloads, specifically mentioning 'Adobe photoshop 7.0 filter software'. This suggests a phishing or scam attempt to redirect users to malicious or potentially unwanted 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.ru/pify?keyword=adobe+photoshop+7.+0+filter+software
    • http://files.melodicfusion.org/uploads/1/3/0/8/130874067/101cf359940308c.pdf
    • http://files.affordablehomeservices.us/uploads/1/3/0/7/130775665/9357012.pdf
    • http://xedune.julietownsendstudio.com/uploads/1/3/1/8/131871493/1825179.pdf
    • http://files.mungerink.com/uploads/1/3/1/0/131070918/37afc82d3233.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/assassin_s_creed_bloodstone.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/dutodisizoruji.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/59572515680.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/56646215943.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/phineas_and_ferb_season_4_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0444/2416/7591/files/composition_of_hydrates_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/95479466113.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/37536084701.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/155592633.pdf
    • https://cdn.shopify.com/s/files/1/0436/9373/6089/files/65189590284.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/comment_fusionner_plusieurs_fichiers_en_un_seul_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/63482562417.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_off000089f6.bin
34898303bcc9d518e564e9b6e4aa1c005fdf0218a1ff41e55e0808b08e37d201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F6 5604 bytes
font_01_sfnt_off00009d18.bin
f4ec1483f06c491bf9c331dea9e1a823d1d42965bd894effade83d4003a4a61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D18 10420 bytes

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