Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd934ccaf5f10f0…

MALICIOUS

PDF

41.8 KB Created: 2020-08-15 03:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b694e186e004531e68a08e42f477722b SHA-1: 2b1c8c630f6dbeafb715f1cdaf2c767a56f28ad0 SHA-256: 6cd934ccaf5f10f0a7b90946fa9cab538d73296c4081e64018c95db8beb2641b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains text related to a 'Jackrabbit football injury report' and a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of a malicious redirector and a large number of external links strongly suggests an attempt to lead users to malicious content.

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=jackrabbit+football+injury+report
    • http://zalit.klinespeaks.ca/uploads/1/3/1/4/131453540/zimajusawo-pasixowipar-rupewewomisi-fenuvonulaki.pdf
    • http://motup.universityplacewallc.com/uploads/1/3/0/8/130814535/1184955.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/litofovivovir.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/saree_blouse_cutting_and_stitching_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/flare_gun_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/pudipebudawigaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/8593784468.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/yoga_janelle_monae_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/muzonajaxetakufojozoxenul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/google_sheets_isblank.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/76684048499.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/63527468898.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/89812521239.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/32186181106.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_off00006554.bin
27d258ed303296a894f465952671f914d130c14c265bd5dc4afbd0b890961c1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6554 5204 bytes
font_01_sfnt_off00007729.bin
c0473f919b444c5dc8bb550fa309d3aaf20f0744ce1cc12b58b212c9b6cb9781
pdf-font-stream PDF embedded font (sfnt) at offset 0x7729 10340 bytes