Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6ae971bff091a9…

MALICIOUS

PDF

33.7 KB Created: 2020-08-27 16:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cd0e78b0f2d1ebac6ad9a3d9e6bfd20 SHA-1: 00afbb505b6fc068ca2233a669376a64a9942533 SHA-256: 6b6ae971bff091a92b84eeb1a7de5a9a4e202e8811eabdc9312c7f32a3b31ce3
154 Risk Score

Malware Insights

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

The PDF document contains a link farm and a malicious redirector URL, suggesting it is designed to lead users to potentially harmful content. The embedded text and URLs indicate a lure related to an Arabic language textbook answer key, likely a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the ML classification strongly indicate 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.ru/pify?keyword=al+kitaab+fii+ta%2527allum+al+arabiyya+answer+key
    • http://files.marthasvineyardgardenclub.org/uploads/1/3/1/3/131381555/nimusunetasazuvex.pdf
    • http://bibemetoj.evespiritualhealer.com/uploads/1/3/1/3/131383648/tavobusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/hp_deskjet_3050a_j611.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/64315848045.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/crime_patrol_satark_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/1361/7302/files/principi_di_anatomia_microscopica.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/78326693747.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/miriwegigokezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/94762210517.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/vizotilexatezobixuti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/deadpool_kills_the_marvel_universe_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/modifiers_tinkers_construct.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/61642469913.pdf
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/sinkmaster_bonecrusher_750_manual.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_off00004722.bin
a34d375ab4ebda0b290d6b82e7a15f6d6efc0dc157bf234c16c0feb2c69a8d00
pdf-font-stream PDF embedded font (sfnt) at offset 0x4722 5332 bytes
font_01_sfnt_off0000594c.bin
58005c2733606a8103ed38bd8064e2805af44c87bbb08b24b331a56b6edce393
pdf-font-stream PDF embedded font (sfnt) at offset 0x594C 9576 bytes