Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b627300a75597f…

MALICIOUS

PDF

56.5 KB Created: 2020-09-12 15:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3387d8435c2219e4bed441df720e5650 SHA-1: 5d1bbbd84db3a90ba38b70af6089e81aa5fbc02d SHA-256: 05b627300a75597f232faa99ac1a4879010969b63d59001c1800ecfe37c968a3
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 external PDF files hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which likely serves as the initial stage for delivering a malicious payload. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector suggests an attempt to lead the user to a compromised site or download further malware.

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.link/pify?keyword=java+bytebuffer+vs+byte+array+performance
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdf
    • http://files.acromios.eu/uploads/1/3/1/3/131383247/runuba-fegipuna-wejuwutu-porutuvojo.pdf
    • http://files.womensquartermarathon.com/uploads/1/3/1/4/131483153/fonapudonijepirake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/bhairava_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/gemischte_brche_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/32271487886.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/38770997056.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/35323192547.pdf
    • https://cdn.shopify.com/s/files/1/0431/5037/7120/files/govuboboketeruzarabokiba.pdf
    • https://static.usrfiles.com/ugd/938c70_628b2bf9264649aaa42d1df984fa85f1.pdf
    • https://static.usrfiles.com/ugd/eed56f_74146dad318c4ad48a3cdb8dbe6cd878.pdf
    • https://static.usrfiles.com/ugd/f1c748_1d9af75b27d64ceb951abb69107fbfb2.pdf
    • https://static.usrfiles.com/ugd/4aae87_05c042ac14ea4d0ebbffc1b49446d1c1.pdf
    • https://static.usrfiles.com/ugd/7f929b_210268fb70784dac8cd7251ffbbf2e6c.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_off00009f56.bin
bfa2db01543f83c1ba330bac84d8465078a5bf6e4b7be5ecf439973c0a283397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F56 5420 bytes
font_01_sfnt_off0000b1c7.bin
e9d92cadf82bbc761ea566ba3f09e6e1f1e47811906b7437519c67df8ce1f7ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C7 10288 bytes

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