Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71862662d3747d7…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 15:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19bb20211d1f1def8376b1163c4938ff SHA-1: 84bd8c48f432a002a581057ca41664b1b3e1b545 SHA-256: a71862662d3747d7e1193340e5f66fb903093d138ca05854788a09fb9b6e722a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=the+accidental+prime+minister+book+pdf+in+telugu'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links further supports a link farm or SEO poisoning attack vector. 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.com/pify?keyword=the+accidental+prime+minister+book+pdf+in+telugu
    • http://files.g99photography.co.uk/uploads/1/3/1/4/131408017/pilofojuv_nolem_xopipovusun_linakiraf.pdf
    • http://wesun.doadagny.com/uploads/1/3/1/6/131606027/lakelekomasinedexeza.pdf
    • http://files.minymabooth.com/uploads/1/3/0/7/130775704/lasaxalanate.pdf
    • http://files.creatingamindfullife.com/uploads/1/3/0/7/130739027/pujomutil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/lunesilorovus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/kefezodokas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/buxiduremudigegimuxat.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/mupavikewuxuwopuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/93061521100.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/talukaramebinajobuwut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/xodovezemujotel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/bamapowofum.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/2014_nec_code_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/9629077519.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/naruto_shippuden_episode_381_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/narudorebup.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/8473757118.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f8.bin
d384c5bb14c8be7115e72a38de7f5fa3ad43425f49053c5211b89ae5bba06659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 5720 bytes
font_01_sfnt_off00007841.bin
ae42a25fcfb07671792460970f495ee1d33fe5a751450268387d39e9611233e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10244 bytes

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