Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed4056832508b79…

MALICIOUS

PDF

50.7 KB Created: 2020-08-23 19:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19bb135e7738abb7014d81a14febf2cf SHA-1: 27d9c735fa5328eef61f4628e290a1b53130d18f SHA-256: 7ed4056832508b79512b60556e1df500271b39178e6d38002157f312ab626ff4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to 'ttraff.com', a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The ML classifier strongly supports the malicious verdict.

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=eye+of+the+storm+book+report
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://files.louisebennettcopywriter.com/uploads/1/3/2/3/132303175/pisagapufotixefov.pdf
    • http://satagug.ashleyscleaningservice.org/uploads/1/3/1/3/131379394/35ae3384.pdf
    • http://files.devonfisher.com/uploads/1/3/1/3/131398091/ladugabafasimaf.pdf
    • http://nupovi.allendaleunionchapel.com/uploads/1/3/1/3/131384306/lazodenop-betuxivesemosax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2778/3080/files/vajanemonobefavasipuru.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/backcountry_magazine_gear_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/int_max_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/bomukifuvedopuwag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/44107217735.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/36499758804.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/jokakofuzivanowesezolud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/savosovadimafazinum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3277/files/adding_and_subtracting_integers_worksheets_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/tratamiento_de_ansiedad_y_depresion.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0272/files/naxagununikafududapada.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_off00007c87.bin
afda102aa6e01817678506d4bf9dbe77fc3b0cf8dd421f8beb8ac5b393cd3849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 4796 bytes
font_01_sfnt_off00008cda.bin
af276e10ab9e042b873ebe2fec87e9e99acb7615c69c902a72b8b72e343fa9f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 10308 bytes
font_02_sfnt_off0000b017.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB017 4324 bytes

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