Malicious PDF — malware analysis report

Static analysis result for SHA-256 627d5f921885226c…

MALICIOUS

PDF

58.1 KB Created: 2020-08-08 09:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d287bee2d751d0414695a406896836f SHA-1: d2adbb3cadfcdf978f5fc9f7ac267ba5922bed62 SHA-256: 627d5f921885226c9d0e8cae7499f261559f2bb74553223d7006ac6d0a745d58
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, suggesting an attempt to create an SEO link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is also present in the document body. This indicates a likely attempt to trick users into downloading malware disguised as a book PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=life%20of%20pi%20yann%20martel%20pdf%20download
    • http://files.angeliquelarson.com/uploads/1/3/2/6/132695575/3276a650fbab470.pdf
    • http://files.beevoice.net/uploads/1/3/1/6/131636807/8652896.pdf
    • http://suxuram.nic-hunter.com/uploads/1/3/1/3/131398020/6454075.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/17382015462.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/exponential_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/rifuvadegam.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/differential_equations_polking_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/40440057377.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/suzujefokibowawubomoduwuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/vimir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/ranibanoguwamadorizufob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7930/2296/files/86482427274.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/zaredibujoxoroki.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_off0000a642.bin
6ddde74438d98f30bdf66f309d952cbb5d28ce55efe93ce33a02996111fbf9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA642 5144 bytes
font_01_sfnt_off0000b7cb.bin
95f1c7098d3c927febd000b322dc0829a73f5f47052be72dbe0de10106651a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CB 10308 bytes

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