Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4516b43e3ef3ab…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 09:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 445c79f3f4409d64f152514702e4ac77 SHA-1: 98a245a5f1c153910e11cfa6f8b9a1a159f1882b SHA-256: fd4516b43e3ef3aba66c35bb2603ae4a84cd7439ad16bf6c3eeba67482421089
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.ru/pify?keyword=auditoria+fiscal+pdf', is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious websites or further malware downloads. No scripts were extracted, and the document body was heavily obfuscated.

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.ru/pify?keyword=auditoria+fiscal+pdf
    • http://files.glasgowfad.com/uploads/1/3/0/9/130969045/eb3a90e9.pdf
    • http://files.stedwardfundraising.org/uploads/1/3/2/7/132740275/sekivepudod.pdf
    • http://files.rccu1.com/uploads/1/3/2/6/132682790/lewesiruxuj_zapuxolel.pdf
    • http://files.dbptraining.com/uploads/1/3/1/6/131607053/24bf368670e64cc.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/velizatanibebad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/guzogixopuzaromolew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/55009584223.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/39599246549.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/45095383314.pdf
    • https://cdn.shopify.com/s/files/1/0431/0997/4169/files/emoji_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/41613199808.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/tiradu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5159/7480/files/96578638684.pdf
    • https://cdn.shopify.com/s/files/1/0446/9784/5913/files/small_to_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/kevin_gausman_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/muzemike.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_off00005d0c.bin
cdeaa62fefda6fa4566ed9c6fcbf9b6a9c973cc685d9fec1cb61aa0a8b69dfa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 5140 bytes
font_01_sfnt_off00006e9b.bin
f1b15d8e4e49d1c0a6d08ef1bb3d2c150ea2c4f440135a503ca7aa538c42c1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 10328 bytes

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