Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa301da438cdaea…

MALICIOUS

PDF

44.3 KB Created: 2020-08-03 18:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b5d0867b734e0f7f404e8073b2e61f SHA-1: 74000fd763b5f8ff0dc4ebe93163d0e7fc081a5b SHA-256: 6fa301da438cdaea99286b22a1f7b050fb9a8ded3d325d65219e1b901c904d89
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is `https://ttraff.ru/pify?keyword=hygienic+practices+pdf`. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to lead users to potentially harmful content, likely for phishing or malware distribution.

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=hygienic+practices+pdf
    • http://files.vermonttrufflecompany.com/uploads/1/3/1/6/131637190/e9807735.pdf
    • http://files.mcearthday.org/uploads/1/3/0/8/130874326/tozegekep.pdf
    • http://files.pictureperfectpainters.ca/uploads/1/3/0/7/130739906/10472.pdf
    • http://files.mountainlakewinery.com/uploads/1/3/1/3/131380600/fibijazumadud.pdf
    • http://files.chefcappyskitchen.com/uploads/1/3/0/7/130775429/kisunaxexunet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/vetalekizosunazefare.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/25573963837.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/44781803756.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/32736930843.pdf
    • https://cdn.shopify.com/s/files/1/0435/6715/3313/files/ralowajiminipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/miwapufibawapebunopitenax.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/article_no_article_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/49042711700.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/25773750434.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/seliwafosejiribipezabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/25688184542.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/25086320260.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/birth_by_sleep_final_mix_melding.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/voritaxojugaloretokobaji.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_off00006ff8.bin
efa1f5bddd355cac43a4bb80dc287f5d606608042ed86f4c48363c03350231b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF8 5352 bytes
font_01_sfnt_off0000824a.bin
80fce0ac8b3b3ce2a10a419358d047db4f83c9573b8832914776eb4e21e430b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824A 9888 bytes

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