Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96b9c67263c45bc…

MALICIOUS

PDF

116.9 KB Created: 2020-08-07 16:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dba4cad65aedb61a370b1b2373715ed SHA-1: 55a2861f9a64a02770c13502e00dd2d9ba01b976 SHA-256: d96b9c67263c45bc63fee8aab23034b318c457bd9890cdebdb5fac5fcc205907
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'digestive system of human body pdf'. The primary heuristic indicates a malicious redirector link, and the ML classifier strongly supports a malicious classification. The file is likely a phishing document designed to redirect users to malicious infrastructure.

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=notes+on+digestive+system+of+human+body+pdf
    • http://files.rearrangewithstyle.com/uploads/1/3/0/7/130775123/fikizujivonu.pdf
    • http://files.marjazapusek.net/uploads/1/3/0/7/130776619/d442d02561e66.pdf
    • http://files.lyndseygauthier.com/uploads/1/3/1/3/131379324/nikipixuw-xikidusorowe-wamagegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/77212747606.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/wofuneri.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/dogadasomazaterugebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/givupovekilivesuvoxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/mugonulunubozukijukemake.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/bafotedenawoxela.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/dexufivikupudamabibukiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/69842135949.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/zejufuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/uncle_tom_s_cabin_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/sexowavixowepidudifuroku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/wivexoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/57958841712.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d92.bin
6cfd4e43c7e824cfddd236382d32247ee3f807225a85fe052fd4806957a67d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D92 5596 bytes
font_01_sfnt_off0001a08c.bin
781c4de6ca2fcd2b1f60f249f18496ca19ab906a8418feeb4f8145a7956db7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A08C 10348 bytes

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