Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4962bf916975b5e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 10:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e0fc6a8f154d86c8e1dfe5d769d42d SHA-1: 58e2673b35068939e0675398fb5944f0d37996b3 SHA-256: e4962bf916975b5e089f1f230128f3a4c9ca4ba380b8c07460a294b830dc04ae
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure to encourage clicks on the malicious links. The primary heuristic indicates the PDF links to known malicious redirector infrastructure.

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.cc/pify?keyword=anatomical+terms+worksheet+with+answers
    • http://files.mwdcoach.com/uploads/1/3/2/6/132682076/mefewufat_gorafupepe_pogez.pdf
    • http://files.skeneheritage.org/uploads/1/3/0/7/130740212/rorose.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/any_video_converter_ultimate_full.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/renikusogasetorigovilafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1590/5185/files/nafilose.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9125/files/51949727270.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/29131656052.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/madexitoxiregotexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/59903949906.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/seguwagafit.pdf
    • https://cdn.shopify.com/s/files/1/0452/7416/9505/files/creative_writing_for_dummies_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/vizeguginop.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/20617215725.pdf
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/nabibarem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645e.bin
de0756b135327d100f09c247946250a15c7a0685f60a6bf0ceb297894e922b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 4972 bytes
font_01_sfnt_off00007517.bin
8228c869e2703d9f041453fc4b469af691d381ae98c4f8163177234df3ae7b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7517 10132 bytes
font_02_sfnt_off000097cf.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97CF 4324 bytes

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