Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2de72def26bcf1…

MALICIOUS

PDF

58.5 KB Created: 2020-08-30 04:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a33a6e32a816f2c7bfb6f7ba3e6f49a4 SHA-1: 19398414e62cfc514723500f639cafcc2aeb4400 SHA-256: 0b2de72def26bcf167985b66644d360f121b720bbb2f036b18ec4ebf86542d95
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily garbled, contains the same redirector URL. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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/wix?keyword=f%25C3%25BCnf+f%25C3%25BCr+den+Kampf+gegen+minneapolis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/14719710004.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/mapa_turistico_de_cartagena.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/pofal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9111/5678/files/absage_nach_vorstellungsgesprch_richtig_formulieren.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/24204709819.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/litapulawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0033/files/9591932246.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/43582143574.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/zotininukek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/66236408476.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1413/files/lezafitik.pdf
    • https://static.usrfiles.com/ugd/b8c837_2da413f5cc3649dbbd2e5839352d23f0.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e3d290d19289468eb34e9565f33c8551.pdf
    • https://static.usrfiles.com/ugd/7f46b5_7efe883bf65a4f42a2174b27afa1e891.pdf
    • https://static.usrfiles.com/ugd/b8c837_3382137978224093a2596f2a0e44a9c1.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_off0000957f.bin
4795a526701f270ef358fe45161f1e67770d2721f57f4ea1013e9390957242c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x957F 3552 bytes
font_01_sfnt_off0000a230.bin
c4b8f4606aba75d4dfe089c6511598c5f5474d43258e8a4c261061270c92a3fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA230 5500 bytes
font_02_sfnt_off0000b4a1.bin
648ec6ba4c40231386650a5d4fa7e72f9450bc56a8e966ba522287a7a8c1b262		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A1 11396 bytes

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