Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74d45cd91e8d791…

MALICIOUS

PDF

55.2 KB Created: 2020-08-20 14:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb798054f08237bcb21b77209643223 SHA-1: a983e373671ce521ba1645afe1be11b3384f86a6 SHA-256: b74d45cd91e8d791352a981e44c83f16f04c91ca3e31851fa73bde2ca6032bc8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious due to a high density of embedded links, many of which point to a known malicious redirector. The document body contains obfuscated text and the primary malicious URL is https://ttraff.com/pify?keyword=guideline+stemi+2018+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2. The presence of numerous links to external PDFs, including benign ones hosted on Shopify, suggests a link farm or SEO poisoning tactic to lure users to malicious sites.

Heuristics 3

  • 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.
  • 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=guideline+stemi+2018+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
    • http://files.rueckkehrzentrenschliessen.org/uploads/1/3/0/7/130739393/wesiguxan-saxanopirupox.pdf
    • http://morobo.lqcolour.com/uploads/1/3/2/6/132695615/8920884.pdf
    • http://lagef.myrandastangeland.com/uploads/1/3/1/6/131636725/5368273.pdf
    • http://files.ncontrack.org/uploads/1/3/0/7/130775462/wexuv_pizub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/intro_to_mineralogy_nesse.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/a_b_c_d_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/papufubokelejurefop.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/impulse_physics_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/73624011238.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/situbelimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/xigamejekubinotuwejufu.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/34852420261.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/59253636652.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/64382427096.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1480/files/80486898200.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000074e0.bin
6a54abba4e99e8cf9f6c76465e9b1ebc4eab3704a8c01cf6adacb2772462001f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x74E0 11580 bytes
font_00_sfnt_off000053d9.bin
59c80c655478752b3ddd9287b9392c2e03fef2890e08e3450c5ea9a8f04284c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D9 4988 bytes
font_01_sfnt_off000064b9.bin
b882c44c4179b1494a3ffea3713f3e10acaee1f866a4fcf474685b622714bba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 6228 bytes
font_03_sfnt_off000095a1.bin
ff85c7fd16ea364b064f9b6d009cf3806f0d334fb8167086727c489dfd3ae4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A1 13192 bytes
font_04_sfnt_off0000bf02.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF02 4324 bytes

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