Malicious PDF — malware analysis report

Static analysis result for SHA-256 3801ebc72af3df8c…

MALICIOUS

PDF

39.2 KB Created: 2020-07-21 08:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8b195871aed3d46092d04de7e75a5c8 SHA-1: 9c873e32c50a22c57c4059d6b914bda8ab13c3c7 SHA-256: 3801ebc72af3df8c0b9538137ffefa49daaa8c06adfc47875373ace414cb7485
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, it features a PDF link farm, a common SEO spam tactic, with the primary link pointing to a Shopify domain. The presence of a visual download button lure further supports a malicious intent to trick users into clicking the link. The document body, though heavily obfuscated, appears to contain text related to the search query in the malicious URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=qasas%20ul%20quran%20in%20urdu%20pdf%20download
    • http://files.carolynangleton.com/uploads/1/3/2/8/132814136/faxixuvajig_fexobegumokinet.pdf
    • http://files.cedarwoodhealing.com/uploads/1/3/1/0/131070378/9445532.pdf
    • http://files.devonvintagecarclub.com/uploads/1/3/0/8/130814283/mujula-bibale-pevoxam-meloromoji.pdf
    • http://files.devonvintagecarclub.com/uploads/1/3/0/8/1
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/nopalunawikosomuneru.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/47825575634.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/34469147745.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/kisiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/40157465124.pdf
    • https://vurivul.files.wordpress.com/2020/07/52547393110.pdf
    • https://labajejumiwi.files.wordpress.com/2020/06/47303566690.pdf
    • https://gonokerobe.files.wordpress.com/2020/07/mixipe.pdf
    • https://nonuwivab179611077.files.wordpress.com/2020/06/53488164865.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/jovutafewububo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/9884079961.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/33200014516.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/13142140563.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/3721948.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/95162884797.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/74711740217.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/41126399961.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/55144850935.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_off00005d41.bin
4a7a500af16e043f052f9d1e5069848239d33749636bfc66160b201bd0ffdade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 5000 bytes
font_01_sfnt_off00006e45.bin
eb64f1cb5e3de00eee6455165228613540842774141a952f6885fdb26b1d6416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 9640 bytes

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