Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f16d8cf83d00702…

MALICIOUS

PDF

45.9 KB Created: 2020-08-01 12:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f5483de264ced8ff3ec36905c14427c SHA-1: 82a256f044e856da20cd4311a24f86cb3ac892fd SHA-256: 8f16d8cf83d0070299ba6c8890f78253fe7457a1f68d00ca8dce48b1f5eee8ac
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=pathfinder+ultimate+campaign+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other embedded URLs, many hosted on file-sharing services, further supports a link farm or redirection strategy. No scripts were extracted from this sample.

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.ru/pify?keyword=pathfinder+ultimate+campaign+pdf
    • http://files.vuwlss.com/uploads/1/3/1/4/131438397/tozopugiwodugo.pdf
    • http://files.autopanelsworthing.co.uk/uploads/1/3/0/7/130739489/kaloseba.pdf
    • http://files.lifelineracing.org/uploads/1/3/1/1/131164130/6575380.pdf
    • http://files.cobramlawntennis.com/uploads/1/3/2/6/132681281/a9cfcc723307.pdf
    • http://files.centralnjrotc.com/uploads/1/3/2/7/132740270/xubimipizegid_ribegoz_xipudolur_jitepipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/36275129450.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/how_to_copy_a_google_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/35306975828.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5074/files/polexijitujudexipajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/30582424169.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/padematoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/64593941754.pdf
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/bivomagadisatesebego.pdf
    • https://cdn.shopify.com/s/files/1/0430/0491/9971/files/25190399924.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/nifesijabit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007615.bin
04c6c8638eb2699993aa13745ceddb725706ed9b4f133349c04e93be22a744c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 5392 bytes
font_01_sfnt_off00008848.bin
6f5949d1140401dbc5db75b38312acdf54e310082d5d2e933dcd1a0f019a1e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8848 10088 bytes

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