Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e70f5cb29303c8…

MALICIOUS

PDF

33.1 KB Created: 2020-08-01 16:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 627ec93492b6a683e6b527a9b1428af9 SHA-1: 4dc4a8079132b66f943373ceb5c7e765ac929fc1 SHA-256: b1e70f5cb29303c8f3b6c35c9d90f1411e294f439e2158d8af80f2343af51e63
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for academic papers, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and other similar PDF links. This indicates a social engineering attempt to trick users into visiting malicious 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.ru/pify?keyword=principles+of+geotechnical+engineering+7th+edition+pdf
    • http://files.computerrepairnerds.com/uploads/1/3/0/8/130813715/kuvuna.pdf
    • http://files.missouririverpaddlers.com/uploads/1/3/1/4/131407918/d90fa245bdf4c.pdf
    • http://files.caricaturesbymichaelangelo.com/uploads/1/3/2/6/132681150/8166191.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/36247984053.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/30561206665.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/nesufagekufalitajusazadun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/9085016581.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/xuwumulebiwifivowule.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/21198022264.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/timupizeruparirimeseja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/36084666415.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/53688534065.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/pavlov_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/20515437480.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_off000043ef.bin
293733a2f25021c8edc9c1cedb0602cadab3108abed9b629990443d8799bfc03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43EF 5496 bytes
font_01_sfnt_off0000569f.bin
92e3cb31cf8ef7273eb40490c0a8d026f1b6c3131c62f6775ec570cd0c0bbfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 9636 bytes

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