Malicious PDF — malware analysis report

Static analysis result for SHA-256 134c590d4cf3321a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 20:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e8e91f639bd2e2716fb326aee76b2a SHA-1: 472f0cca89eeb2432132e1e1513e292453534bd6 SHA-256: 134c590d4cf3321aadf01b310bc08eec67de22eafad14d20820517ca824cc2d3
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The presence of numerous embedded links, many pointing to Shopify-hosted PDFs, further supports the attack pattern of a link farm or SEO manipulation.

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.ru/pify?keyword=ghost+in+the+shell+solid+state+society
    • http://files.whitmancountypublichealth.org/uploads/1/3/0/7/130739776/puwozazobejifa.pdf
    • http://files.rachaelsterlacephotography.com/uploads/1/3/1/1/131163666/gutawinonir_dezeg.pdf
    • http://files.montessorieducationforautism.com/uploads/1/3/1/3/131379671/577303.pdf
    • http://files.spalderick.com/uploads/1/3/1/4/131413718/bomesapum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/71906848082.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/titopalagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/87801475713.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/tunalatowinabasitis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/vomatuxowutijobegaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/vasejufokemaxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/sunewijawij.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/39772383755.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/dnd_paladin_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/ruzakaxadoxigarifu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f8.bin
234d7cee2dfc62cab646f9626c70ce23c63a6f45fff20371c05900c279fddf1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F8 5208 bytes
font_01_sfnt_off00006ad9.bin
19596e115a693cf63520f081b1c4abb83eb9fc55fa2ffe50eb1b14f8ef18bb6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 5064 bytes
font_02_sfnt_off00007c18.bin
85408079562a2713c8a7586f203e6a6ba520cd9776f11ccce7faefdd08d7d9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C18 10280 bytes

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