Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbee21b21a08dad…

MALICIOUS

PDF

69.9 KB Created: 2020-08-05 03:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3c166cdcabd756c2db9707776bd5fc SHA-1: 2834473891bcbe17cf4ce806945c008ff73d8ab7 SHA-256: 5fbee21b21a08dad6bd5b634f34e09fa9d2b74dde72804d62ea54f2e6795eb39
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.com/pify?keyword=energia+eolica+pdf+libros`. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=energia+eolica+pdf+libros
    • http://files.bearcatwrestlingclub.com/uploads/1/3/1/3/131384468/rusinojabat.pdf
    • http://files.sellyourtxhousefast.com/uploads/1/3/1/3/131381480/8974705.pdf
    • http://files.ccrid.info/uploads/1/3/2/7/132741023/9126402.pdf
    • http://xapipe.utahdivorceconsulting.com/uploads/1/3/0/9/130969045/lutusabuleku.pdf
    • http://files.pamirspecialtours.com/uploads/1/3/1/3/131379049/039ccd9a91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/39097687264.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8764/files/vezus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/ririduxugavuzamakuzimadet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/mabijoxisum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/23634332138.pdf
    • https://cdn.shopify.com/s/files/1/0438/0177/2192/files/don_felder_heavy_metal.pdf
    • https://cdn.shopify.com/s/files/1/0439/8887/7470/files/fefajegal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/dudeta.pdf
    • https://cdn.shopify.com/s/files/1/0437/4721/3464/files/fezomo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/40309242673.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/patowolofinojotijus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/fofizererifive.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/amparito_roca_jaime_texidor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/rojusavomutirowapol.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c471.bin
91cfb34bd9c1c0d16c71c4223e283b678546b0d5fcfa107dad3b807163f65730		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC471 5128 bytes
font_01_sfnt_off0000d5d5.bin
e6fb9eb1c7ec36684bae0be2e73631c7b8bb69f0829f51a6faca16093c51fd9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D5 11756 bytes
font_02_sfnt_off0000fbdf.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 4324 bytes

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