Malicious PDF — malware analysis report

Static analysis result for SHA-256 7822c8aa8c46a85a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 22:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e30f420111fba768016f149e5940faab SHA-1: 327a2a9b3d035dc35e347423896904e1982e2c33 SHA-256: 7822c8aa8c46a85a6b796b054d0e6b6f9895f68d5a25433424d31e1ebbcfc8bc
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, including a primary link to a known malicious redirector at 'https://ttraff.com/wb?keyword=lathe%20cutting%20tool%20angles%20pdf'. The document's content, though obfuscated, appears to be a lure to encourage users to click these links, likely leading to further malicious content or phishing attempts. 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/wb?keyword=lathe%20cutting%20tool%20angles%20pdf
    • http://files.dmitriynurullayev.com/uploads/1/3/1/4/131438899/9719266.pdf
    • http://files.scruffylocks.com/uploads/1/3/1/4/131452846/94e8675.pdf
    • http://files.apartment-in-zagreb.com/uploads/1/3/0/7/130739806/ruxaxojif.pdf
    • http://purugajip.theslaughterhouse1025.com/uploads/1/3/0/9/130969465/1818030.pdf
    • http://files.rackaddictattractants.com/uploads/1/3/0/8/130813413/vokagadabo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/suburban_sw10de_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/51685009673.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/zulububizaneruvuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/rogaxadijududixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/nojegitalujemakefodulegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/jemomulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/konow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/11237238590.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/dedijorozexomilowuwugoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/mtd_wood_chipper.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/pulevufebefixipalomaba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/ggplot_x_ticks_angle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064dd.bin
254ec072256ffb2facb90f93fea9f5679e8fee68ef7b24ef055326e90eb5c18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 5144 bytes
font_01_sfnt_off0000765c.bin
1c0517dd3aea03576ffeb291878477c3e6ce8fa9c61f9c5454fddbb2108d9a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 9720 bytes
font_02_sfnt_off0000979f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x979F 4324 bytes

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