Malicious PDF — malware analysis report

Static analysis result for SHA-256 87921d92f49f6ef3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 02:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a5b189b59bc64438cbff08c38674fc SHA-1: 39d871ac9a9f6a2563277401e295f86346983d9c SHA-256: 87921d92f49f6ef369015ae1627ae8e9739e9bb481f36aa523006e68a3e77ae6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=love+death+and+robots+imdb+parents+guide', which is identified as a malicious redirector. The presence of numerous embedded links, including those hosted on cdn.shopify.com and other domains, suggests a campaign to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=love+death+and+robots+imdb+parents+guide
    • http://kofeb.embracingyourenergy.com/uploads/1/3/1/3/131378950/xagofenewogar.pdf
    • http://files.sheknowsadventure.com/uploads/1/3/1/4/131438829/7a177.pdf
    • https://cdn.shopify.com/s/files/1/0436/7033/9737/files/luvukulizila.pdf
    • https://cdn.shopify.com/s/files/1/0460/1731/4975/files/comilla_board_jsc_result_2018_with_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/satya_arkestra_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/30485080601.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/astrology_book_in_bengali_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/daytona_beach_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/eicr_report_edinburgh.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/nojukokidafusasubajiwefud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/anlodipino_5_mg_bula.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_off0000697d.bin
b9ac3ab1d716d0b8d0cd624a1281c29329499ddc0379f7bd17fcdcb05469f612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697D 5484 bytes
font_01_sfnt_off00007bf7.bin
2247d1979555182d0c410f196c707ea749894efd7f680c80189c16998a4449ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 10820 bytes

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