Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d1a3617f815a73…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 17:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecfbf196a8c951bd5c6785ea9c5027aa SHA-1: d5d38b4eec4c9580e8220f549aff3ea0ec5a72fd SHA-256: 50d1a3617f815a7307e4ba7a547431f283bb588f335284508bda1539ad46193c
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The primary malicious URL, https://ttraff.com/pify?keyword=certificate+of+origin+of+the+people+s+republic+of+china+pdf, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing its role in a redirection scheme.

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=certificate+of+origin+of+the+people+s+republic+of+china+pdf
    • http://xagamanur.norwicharcheryclub.com/uploads/1/3/1/0/131070872/kogejoxuxosu.pdf
    • http://files.mygrapplingvideo.com/uploads/1/3/2/7/132740278/losijowixasisi.pdf
    • http://lamox.wirralcommunityorchestra.co.uk/uploads/1/3/1/3/131378776/soromedub.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • http://sejages.antlers2fins.com/uploads/1/3/2/7/132710712/bilemiwad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/14688780520.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/wipimodipugeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/6212552874.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/capital_market_reforms.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/favajoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/69029018054.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/varicocele_tecnica_quirurgica.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/zupimipubijiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/lomakupanijupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/april_current_affairs_2020_ssc_adda.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/what_s_in_forgetfulness_potion.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/69712701213.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/nomenclature_of_haloalkanes.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4a.bin
9e88b25327edfcb0eb6feebeb28791f93a07772bba11631fbc49a7bc1c8e6ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5464 bytes
font_01_sfnt_off00007ecd.bin
1d1590c66cfdc4aff7d3468c20cae78f38a5216d408e532c081d8fe4115f0c05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 9652 bytes

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