Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db4c053dbbd7fad…

MALICIOUS

PDF

56.6 KB Created: 2020-08-09 18:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a56b10a8c519f67a42fe3152cc07a24 SHA-1: 23ee8e8b17d7e43161995af7c91d02ea59e13923 SHA-256: 5db4c053dbbd7fad008a3da62e0ce01dd38d01b7bc7baac0c1249607434d8aa4
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 Shopify domains hosting other PDFs, but one critical link redirects to `https://ttraff.cc/pify?keyword=lakshmi+narayana+kavacham+telugu+pdf`. This indicates a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=lakshmi+narayana+kavacham+telugu+pdf
    • http://files.clarevet.com/uploads/1/3/0/7/130738814/6baf8b64a8319.pdf
    • http://files.jmancastudios.com/uploads/1/3/0/8/130873875/388139.pdf
    • http://tivoloxa.birdsintheattic.co.uk/uploads/1/3/0/8/130873851/geruvoziwitoluz-merekap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/pathfinder_bestiary_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/54751871294.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/atlas_of_veterinary_pathology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/30220942767.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/anecdotal_records_of_students.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/4778611063.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9217/files/bicep_mass_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/35835377016.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/brand_equity_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/export_linkedin_profile_to.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/tepiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/20843050429.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ccb.bin
1d2a019188d60ce9dfe0541005004b995cdb382efc14bfb87a0ada2adb509e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCB 5508 bytes
font_01_sfnt_off00006f66.bin
8ccabdd2dfa662342819a84983ee363356a49fad9d83ea3fd6cd1050ed554538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F66 18784 bytes
font_02_sfnt_off00009bf3.bin
eaadcb95dcd0d157b141c8d8bac34a57f2d8795010d4cdd13e7539a853fbe4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF3 13996 bytes
font_03_sfnt_off0000c6ac.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 4324 bytes

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