Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd301b6faaf639b…

MALICIOUS

PDF

47.7 KB Created: 2020-08-20 13:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d741d9009895eb4d3bf36053e64d4d29 SHA-1: 601d11039b2f6a038af510172b6149d1b6965d3c SHA-256: 6cd301b6faaf639b7539b30096c446924f0548d30e57484164ba0254b9c1ddca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to a known malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lure users to malicious infrastructure.

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.ru/pify?keyword=4th+grade+math+constructed+response+worksheets
    • http://selajenaz.janellesmithnutrition.com/uploads/1/3/1/4/131483603/2ef9b.pdf
    • http://files.faithbridgeumc.org/uploads/1/3/0/7/130775918/popet.pdf
    • http://files.lifeandpeacephoto.com/uploads/1/3/2/3/132303248/e9ad73ef5aca11.pdf
    • http://files.apriest.com.au/uploads/1/3/1/4/131406736/norulefamen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/79538753900.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/66312604648.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/2801228910.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/21538099178.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/40._4312_80._0016.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/juvatunevejiwerixopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/fesonegujuxadikutumopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/40038239060.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7441/files/39313743833.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9518/files/polar_fleece_sheets_split_king.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/73086575213.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/14515843430.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/94974125418.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/encyclopdie_animaux.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005771.bin
0d9c2e6f5a90dd94300548bda6f9f59e49c989a3076e1e94baf791aca9fd7e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5771 5436 bytes
font_01_sfnt_off000069dc.bin
3baea4e167ba28fc5fd58749019fc8ab29929ffe5e5bfad6f3827b2f65bdb541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 10592 bytes
font_02_sfnt_off00008e15.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E15 16092 bytes
font_03_sfnt_off0000a2dd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DD 4324 bytes

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