Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea8f7bcfae03bfd…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 22:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c387689e46213a0470d4937fd6be19f5 SHA-1: 4b37aafb4632f366924b204232265091465d09d6 SHA-256: bea8f7bcfae03bfdf36a54b6af1921f1a28d4663ed36210c3843a4ffb1882cf7
150 Risk Score

Malware Insights

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

The PDF document contains a lure related to "chief accountant cv pdf" and embeds a significant number of external links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links points to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely to manipulate search engine results or distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=chief+accountant+cv+pdf
    • http://files.cdaltonpsychology.com/uploads/1/3/2/6/132681713/0089501.pdf
    • http://files.sanmateolimos.com/uploads/1/3/1/3/131383553/612544a.pdf
    • http://files.charlottedixon.net/uploads/1/3/1/4/131483955/e2235.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/16356142710.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/zizogapanixobi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/zamipezatolubumo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4178/files/18316505124.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/bonetupemeronenibuluvagi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/koromewogifusujogiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/4093914789.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/fedifuridabajow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/80941555230.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/69348343221.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/negima_episode_1_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/saduziforoxizu.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_off00006995.bin
b4f9c028f500ed85d6f07d2919bb5a2d8e96dc3afd52fd8b7be4aa9573f4e287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 4904 bytes
font_01_sfnt_off00007a4d.bin
003ae541e55a59e0276167d1658c622aad505d3f7db8b1339e958c5fc12be913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4D 10536 bytes

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