Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef75118646404be…

MALICIOUS

PDF

43.0 KB Created: 2020-08-01 19:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be38114578b869b1d6c4e4a0b3af1a2c SHA-1: 382d47e38eb7450ea1c7978b39219f1acfb84d45 SHA-256: 4ef75118646404be8dbeeda7ed2535e8f4646b72279420e5989abe4a120ec7c0
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is presented with a search query for 'gorillaz demon days album zip download'. This indicates a social engineering lure to trick users into clicking the malicious link, likely leading to malware download or a phishing page. No scripts were extracted from this sample.

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=gorillaz+demon+days+album+zip+download
    • http://files.ericatremblayresumespecialist.com/uploads/1/3/0/8/130874543/zanepofekelo.pdf
    • http://files.rochesterartsadvocate.org/uploads/1/3/0/7/130775831/pevofopaxozuz_mubovojisa_kevotena_zeradoveri.pdf
    • http://files.lovebirdsvintagedecorrentalsofpa.com/uploads/1/3/0/7/130740504/wifomowogitilut-vuvakiju-tuwib-wosofetegulivu.pdf
    • http://files.thetravelexchange.biz/uploads/1/3/1/4/131414743/aee8fa14d900.pdf
    • http://files.westcentralcamp.com/uploads/1/3/2/7/132741241/befonuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/fesoweximowupobin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/foxinuxagox.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/74171807603.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/16961623172.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/letebotonir.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/rigilanukajesovotebefiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/razex.pdf
    • https://cdn.shopify.com/s/files/1/0433/3646/6590/files/15873039821.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/mojojakaduwi.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_off000067ce.bin
59e272f38fba7e4c52d916d165843f5d4251902e40a8d727008482abf2d6a085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 5520 bytes
font_01_sfnt_off00007a97.bin
a360931ed75a14a1989a27451120f7bd02ca7f7fc0fd6226274ae7703c32565c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 11276 bytes

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