Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc75a5ec06c9598…

MALICIOUS

PDF

36.5 KB Created: 2020-08-01 07:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db9cf70cfc9710bd55fbfe5f9bcf361 SHA-1: 3fc9d981a06e6e835744471547ae19d43cae3041 SHA-256: 6fc75a5ec06c95988c6a3cfddf19cdab8092f040da9f19ee671f3e0df7fb3359
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to a redirector service. The document body text is obfuscated but appears to contain a lure related to song lyrics, likely to encourage clicks on the malicious links. The primary malicious link identified is https://ttraff.com/pify?keyword=avenge+sevenfold+afterlife+lyrics, which is flagged as a malicious redirector.

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=avenge+sevenfold+afterlife+lyrics
    • http://files.angiessnowhut.com/uploads/1/3/1/1/131163559/jozal_xitoperokijusaf.pdf
    • http://files.southgateanimalhospital.ca/uploads/1/3/1/4/131454221/7703610.pdf
    • http://files.youthgolfersoutreachprogram.org/uploads/1/3/1/4/131454452/f0d99f826b9.pdf
    • http://files.oaxacamezcaltours.com/uploads/1/3/1/8/131856543/46762c58bc2.pdf
    • http://files.lttsi.net/uploads/1/3/1/4/131437172/puxazenagejapa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/66961570435.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/94663857142.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/supreme_ruler_ultimate_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/juzizulizemowofusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/catholic_voters_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/73014208788.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/vasubomiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1213/6855/files/zalesokate.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/72615267551.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/24192995886.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/varovob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005200.bin
9341ae9899c84378ef4a15eb992539758001e78e80bec536ccb6caebd705e4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5200 5340 bytes
font_01_sfnt_off00006453.bin
a2a2f698a24738f60a252bb51fb1e5578ef8fd05820f3644752b6753c4c0012b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 9572 bytes

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