Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1d326659462dcd…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 22:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75eeeece0fb940ee9ed831be483d509 SHA-1: 25a6beb18451d3669e7a1cf7a7e0661e4b19d859 SHA-256: 1f1d326659462dcdc353aaa70f94ae1adfbcdca4d03c55c18c7bdf8f697a340f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, and a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=probability+mass+function+pdf+difference'. This indicates a link farm or SEO poisoning tactic designed to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=probability+mass+function+pdf+difference
    • http://files.gijsmulders.com/uploads/1/3/1/4/131483279/limidifunowut.pdf
    • http://files.canadoretv.com/uploads/1/3/1/6/131637546/noxiwutezepoxil_kakenolox_tanulij_kifuf.pdf
    • http://files.moombaparkps.vic.edu.au/uploads/1/3/1/8/131856435/tonebexatad.pdf
    • http://files.paulsfranchiseleague.com/uploads/1/3/1/4/131438249/kabuvoxije_kuvorenuzixuw_raxejusub.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/clinical_biochemistry_laboratory_tests.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/nuburaxezedag.pdf
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/nukegofaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/84296010146.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/10244725669.pdf
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/tezosijuxed.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6141/files/xizepajejuramososijoditir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/wimixikifibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/76994199922.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/jexebigu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/makokesubiniv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/pams_harvest_craft_mod.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e18.bin
e06fb6fc6eeec6fea5ccc5a0d71e598675717d3dc0124910a69ebad96f09d7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 5544 bytes
font_01_sfnt_off000070df.bin
4d6378adf30870371e99b6d235dc90bf0173c11a6686a222097aa7e3df306130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 14136 bytes
font_02_sfnt_off00009e3e.bin
1cf1efff6547351509dc53cc43a40bef7b895d80857af52aaed433ae830d8356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 16404 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.