Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8e0c14cc7652d3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-10 23:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab48bf3d21a3ed9de662667be2d81f1c SHA-1: 6fd60f569be2ac5af38c6da0cb1ec8f66d6273e8 SHA-256: 5e8e0c14cc7652d32b1a27dc665c4a8fcbf35059c6384c9fada44d3c0a2cd57b
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 a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other potentially benign Shopify links, suggesting a lure to external content.

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.ru/pify?keyword=features+of+effective+communication+pdf
    • http://pewipuwe.craighouk.com/uploads/1/3/1/3/131398091/5f0676f60bca69b.pdf
    • http://files.cardenarborview.org/uploads/1/3/0/8/130874125/bulimegefotevo.pdf
    • http://files.rhlab.org/uploads/1/3/1/8/131856698/4923503.pdf
    • http://files.allthesangwiches.com/uploads/1/3/1/6/131606687/powaluwodubosulepi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/windows_10_sound_schemes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/zasikid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/robokopekenidoweliwumuwos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/2020_acura_tlx_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/5308407949.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/62700201496.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/dejaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/godivosekipeno.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/85177088478.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3873/files/gokerinanolukojedepuweju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/search_iphone_chrome.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_off000064c6.bin
136bd81a2fb7ae67fc6c276abec0db2ce049c5ec943dfbe1986a42367d207986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 5284 bytes
font_01_sfnt_off000076b5.bin
0cc78b7b2a156d7cf89db9c01a144e7cd474f22c6ed484fc1c635b51945149c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 10036 bytes

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