Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d5fb7ffab25000…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 13:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723b6833af771a72e451fdbbc5edc545 SHA-1: 41ce6c8ea8a3c14c96a4dcbbd26a5b4b59508990 SHA-256: 98d5fb7ffab25000e691ef20795a537ff41a3ecf83e7336076425c0c9743d880
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure for a book download, likely to entice users to click the malicious link. The presence of a link farm heuristic further suggests an attempt to distribute malicious content through numerous external links.

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=livro+capit%25C3%25A3es+de+areia+pdf
    • http://files.dpjutzi.com/uploads/1/3/1/8/131859370/rozimopoxabipomo.pdf
    • http://vedesaxen.vinified.co.uk/uploads/1/3/2/7/132712615/d7ded195c47fb.pdf
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdf
    • http://nazafizev.mandmbarkery.com/uploads/1/3/2/6/132695969/fb6a376710bacb.pdf
    • http://files.refugeehighway.net/uploads/1/3/0/7/130740189/3580641.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/55027898344.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/urllib2_vs_urllib3.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/47305440850.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/68046084818.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/42217738282.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/36181339109.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/51616070054.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/41084962245.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/gebibozuwigazixuvew.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/cg_pet_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/zevukenabexafej.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_off00006291.bin
a39fbe168bee40059304a5b7c448080563ba660fda74b7eaed226a101d1a9bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 5436 bytes
font_01_sfnt_off0000748d.bin
9dd21c0ed4b4439f99ec1a67907c9c87d286332af3507b02f5031497e1453f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748D 12292 bytes

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