Malicious PDF — malware analysis report

Static analysis result for SHA-256 43674a01fb073ed1…

MALICIOUS

PDF

57.3 KB Created: 2020-09-20 22:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ee9dbaf821c0e3d71e369ad120ab6c SHA-1: 406a1d903f652bdec775a4a6ae531ef162c7b415 SHA-256: 43674a01fb073ed1c10c90ad897e330ee7a225180c0d66834a014b08e388338b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, which is characteristic of a link farm or SEO poisoning attack. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=level+guide+100-110+bfa'. The document body, though heavily obfuscated, contains text fragments and URLs that align with this finding. The presence of numerous PDF links suggests an attempt to distribute malicious content or phish users through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=level+guide+100-110+bfa
    • http://wositaz.stantonmiddleschoolbands.org/uploads/1/3/1/0/131070588/petodatotolobo.pdf
    • http://sutinumi.kiwibokke.com/uploads/1/3/2/7/132712129/8358685.pdf
    • http://files.yantraearth.com/uploads/1/3/1/4/131411688/vudugan_bozibuzad_notawoguputemo.pdf
    • http://files.rosannadiggs.com/uploads/1/3/1/3/131384401/8dc2b87de0751d.pdf
    • http://juwujomam.kihtayracing.com/uploads/1/3/1/3/131379824/zinafude.pdf
    • https://582a35ae-0784-4b48-bdf0-e7faf937de28.filesusr.com/ugd/05e3ad_e2a6b566cd574300b4909a28ba1fbf98.pdf?index=true
    • https://a964fdb3-657d-437b-a891-5566e5fee87f.filesusr.com/ugd/735424_e152ddd0e8f240c2910b02a82ce92462.pdf?index=true
    • https://747d921d-58f3-440f-b957-8d6fa7bb2489.filesusr.com/ugd/268ab1_16596155cef74103b5d6fcf4ebacddf8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/81513966916.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/writing_bibliography_in_apa_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/29612633643.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/99878168181.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/35711989856.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/8552907992.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7475/files/lowndes_county_board_of_education_salary_schedule.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_off00008d08.bin
2c51466c7bc7a5cd63fe19b7ab46c844d7156209475b227c7d065d771ae4084f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D08 5168 bytes
font_01_sfnt_off00009ecc.bin
ca026831ee955b53a853b5eaa9164b00d7d6640c70110d2365fe3e4d0a33440e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECC 10404 bytes
font_02_sfnt_off0000c2a7.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A7 16312 bytes