Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f43368c7da8a5ed…

MALICIOUS

PDF

42.4 KB Created: 2020-08-14 11:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfef295b775012ab3b08574045f37399 SHA-1: 4d9bc1805585b9e1bd1d214c7b13c08ce2ca3c08 SHA-256: 0f43368c7da8a5ed6f0ed23ca636b551e241b66ac96ab1375daad7f548405bd7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary redirector URL being https://ttraff.cc/pify?keyword=detroit+become+human+pc++portugues. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the game 'Detroit: Become Human' and the wkhtmltopdf application, suggesting a lure to download or access malicious files.

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.cc/pify?keyword=detroit+become+human+pc++portugues
    • http://files.ambcircleoffriends.com/uploads/1/3/1/4/131482916/3554244.pdf
    • http://files.twolazylittledogs.com/uploads/1/3/1/4/131409090/fogajokobinubogerus.pdf
    • http://files.mississippimudkennels.com/uploads/1/3/1/4/131406344/aeb35effe.pdf
    • http://xuvop.foreverperfectflowershop.com/uploads/1/3/0/8/130814088/pijagisugux-tupugigibame-jasotolew-gesonoxunuwuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/tezok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/33719439451.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/47805087650.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/73762649309.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/32561030907.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/bijumenezis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7556/6752/files/tinkers_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/esame_celi_5.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/77250364894.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/16382316928.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/81754453067.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_off000067c1.bin
9c4f4837bd86f6d9e979cf1f2412825a4be8873fc508d8628e87f685529fb524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5452 bytes
font_01_sfnt_off00007a25.bin
50b7bfcf6dd410bcb58fbf0e998e1ff1a679a69c098a61b0024e67cf6505b068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 10096 bytes

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