Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bc6dd5fee77185…

MALICIOUS

PDF

53.2 KB Created: 2020-08-08 13:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba1a2c2631104e9f98ed6e796c00bf51 SHA-1: 33c6a007784041aac8b68731f8cf4f1d6951b457 SHA-256: 64bc6dd5fee77185ecb32925819de5fc56ce14f3da2e8aaa780fbfb21c2e48a0
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of malicious redirector links and a link farm.

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=amplificateur+diff%25C3%25A9rentiel+pdf
    • http://files.generationxgoesglobal.com/uploads/1/3/0/7/130776661/df483078bdee30.pdf
    • http://files.cveducators.org/uploads/1/3/2/6/132681969/xuzel-kixijukusa-zudevod.pdf
    • http://files.sedistrictpaha.com/uploads/1/3/1/3/131381679/pobox_fobedujanojuto_nobovorasilux_bisawir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/88737460901.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/97141388771.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/present_past_tense_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/32044957974.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/xujanedima.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/defavowenim.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/java_programming_balaguruswamy.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/16991770291.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/26119940430.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/tifakupazotinopitos.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4629/files/statistics_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/maxuvamafazebuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/27629129478.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/mufepifirelutubuxuxo.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_off0000813d.bin
ad1cedcf15f49bc7ed2830de0f728c3756325eab826c70cbd2fb54f82fc32b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813D 5252 bytes
font_01_sfnt_off000092c4.bin
42ec7e0e34e998d728329b625c8130ad2c7486e2ea683919418337bcc187bfa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 17148 bytes

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