Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0405c5e35474509…

MALICIOUS

PDF

54.9 KB Created: 2020-08-23 19:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bafb79f3bc157861776a76375b0117b SHA-1: 84807c1b1d0d7be35b5758951c05379d91fed054 SHA-256: a0405c5e354745092bdfcd4b5da6538abf63cd83ac3864493d774e6c7aa8b9e9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with at least one pointing to a known malicious redirector (ttraff.cc). This suggests a link farm or phishing lure designed to direct users to malicious content. The presence of the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics strongly supports this attack pattern. No scripts were extracted, and the document body is heavily obfuscated, but the link farm is a clear indicator of malicious intent.

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.cc/pify?keyword=angular+form+reset+field
    • http://kevupejel.jgsnj.org/uploads/1/3/0/7/130738914/zevokiromun-jutosazibonaxug.pdf
    • http://nasasu.tritonarts.net/uploads/1/3/1/3/131398091/5075185.pdf
    • http://files.theblakegroup.net/uploads/1/3/1/8/131857112/e45cf7b56c1301.pdf
    • http://files.gameplayer.dk/uploads/1/3/1/1/131164236/pagozakadewi-sifiboweme.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/likukojew.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/zulopegulaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/lumusofinopijerizisozuxof.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/48126236085.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/vozeteliwijomatarejemun.pdf
    • https://cdn.shopify.com/s/files/1/0451/8114/1143/files/81690150086.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/describe_the_picture_worksheet_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/building_construction_by_rangwala_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4246/3126/files/61390005078.pdf
    • https://cdn.shopify.com/s/files/1/0462/2123/0233/files/biker_mice_from_mars_snes_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/12192624229.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/38416699933.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_off00008689.bin
7d674e64ca5a3d588758dc475ff5d19c9070a45170e62b70f5d935fb2839ee4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 5216 bytes
font_01_sfnt_off0000982f.bin
dc85354a218b6e70e2655f5db0a809fff506b9f0e4e6b326e134ae3303a8f5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 16728 bytes

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