Malicious PDF — malware analysis report

Static analysis result for SHA-256 5018c4381bfd9692…

MALICIOUS

PDF

40.2 KB Created: 2020-08-07 23:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41936274e5a3c89e033f3577351d2fac SHA-1: fd5e44850a954ace304cd462a19dd3523364931b SHA-256: 5018c4381bfd969298588b82a41611d808c4e24e88991cb2af403015a07eb0c9
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the text 'Multiplying worksheets pdf' and the URL 'https://ttraff.com/pify?keyword=multiplying+worksheets+pdf', suggesting a lure to download a malicious file. The PDF also contains a large number of links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious content.

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.com/pify?keyword=multiplying+worksheets+pdf
    • http://kodugit.pathway2well.com/uploads/1/3/0/7/130738943/1913712.pdf
    • http://files.pianomethod.info/uploads/1/3/1/4/131437242/gusiribisewixejukero.pdf
    • http://kavej.mycookielab.com/uploads/1/3/1/3/131383314/nuvexanet-noruja-gosipusipibe.pdf
    • http://libal.wilkensestate.com/uploads/1/3/1/8/131856772/9110938.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/sub_vector_c.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/68385009601.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/gisovilepowutepawuruf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/82776965148.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/digotozevewujuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/tarototejox.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/introduction_to_geographic_information_systems_chang_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/96667738711.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/86787036303.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_off00005f4d.bin
f8c986830c5c2fb02547903fd1f720880dfd3198724419c99ca8bda03b209e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 5356 bytes
font_01_sfnt_off000071a9.bin
7e81a15859ac216379745ca474323b312a743107410d7269a541c75ae85bbb08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 10132 bytes

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