Malicious PDF — malware analysis report

Static analysis result for SHA-256 547c32d620f4cbe6…

MALICIOUS

PDF

36.7 KB Created: 2020-08-07 22:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f5d26d8691ff02ad5cd169f7a6d85fe SHA-1: b7c1c729c4369ae28d3f147b611e7c9eb2b903da SHA-256: 547c32d620f4cbe664b6357948a6eba33f3054d9ae69bad4297ebb7c388247ab
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body text, though partially corrupted, includes a URL that appears to be a lure for a specific book title. This suggests a phishing attempt to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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/wb?keyword=strickberger
    • http://files.lisabrackin.com/uploads/1/3/1/3/131398419/xoradigevipa.pdf
    • http://files.kmffa.org/uploads/1/3/1/3/131383629/8c851bb19e080.pdf
    • http://files.chrislewisjonesartist.com/uploads/1/3/1/3/131398419/7e87f60.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/voxatugiragorotip.pdf
    • https://cdn.shopify.com/s/files/1/0438/1097/9997/files/pudigenixipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4962/3462/files/50775663643.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/losubikofimaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/pefune.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/640316818.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/79644516663.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/29826457253.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/55905586397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/kimubolodixabowakux.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/dodotolitur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/vebatojur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/69580638482.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.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_off00005021.bin
4627569ac941e97e18af0dcf1715e16b7b7b7c4f9180d8981599aa6e733169a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5021 5732 bytes
font_01_sfnt_off000063b0.bin
8d6b5bd1510fefbea5e4d7cdb95bfe4b25fa67f558b0f917bfd63bf0e5804bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 9844 bytes

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