Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c1ce955a63f11c…

MALICIOUS

PDF

38.4 KB Created: 2020-08-19 06:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341c0352368ef875d12b8a8016fb6c61 SHA-1: d9c277d15ec24f2185402fb1c79f23b3999540e8 SHA-256: 93c1ce955a63f11cc62e294571662119ce8cdc080c19de93cba7d30c26fd27ac
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body mentions 'Grand opening postcard template' and includes numerous embedded URLs, many pointing to Shopify, but one critical URL to 'ttraff.com' is identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially to distribute further malicious content or improve search engine ranking for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=grand+opening+postcard+template
    • http://files.petereident.com/uploads/1/3/2/3/132302924/28541495ffa7b.pdf
    • http://files.lynngoldstein.com/uploads/1/3/2/6/132683251/vosagiboma_nigopadebaledu_bapusafute.pdf
    • http://files.studioandronico.com/uploads/1/3/1/4/131483372/niribe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2934/files/multiplying_rational_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/sorawol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/37062982248.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/29363796562.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/xusefabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0193/7063/files/kafumanaropogewimur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/subject_verb_agreement_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/kebubusugunid.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/kowabexiwefanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/92961057956.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/scalp_acupuncture.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_off00005897.bin
234d7309e44257187fe8060c1fad5c76a7b96f6c1d0513f2b76c6d4741b98cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5897 5424 bytes
font_01_sfnt_off00006af6.bin
bd6bc0e52ebadb544e7f3eaa6abad49948fd70c206a1063fee21ec31c145631f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF6 9852 bytes

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