Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb56f7f49ce776c…

MALICIOUS

PDF

52.9 KB Created: 2020-08-01 20:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8af8c278a5e289bfb660e37b6feb38f SHA-1: b358ab4c96416e0103886e4009e6a8d3b3964098 SHA-256: ecb56f7f49ce776c722e83f6e600b7031988650d325050ce70d3022c8008de84
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of external links, a technique often used in SEO poisoning or to distribute malicious content. One of the embedded URLs, https://ttraff.cc/pify?keyword=montana+state+abbreviation, is identified as a known malicious redirector. The document body is heavily obfuscated but contains this URL, suggesting it is the primary lure.

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.cc/pify?keyword=montana+state+abbreviation
    • http://files.lemonteilrevolution.com/uploads/1/3/0/7/130739678/dabimikanupitiv_fegowojidomet_mixufudap_pasuf.pdf
    • http://files.communitybuildersnz.org/uploads/1/3/0/8/130814017/7709716.pdf
    • http://files.plantshappen.com.au/uploads/1/3/0/7/130775537/6ef6821835d4.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/69899884254.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/dubawibuborulisububizegom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/gunite_cross_reference.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/zuzirir.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/33996223951.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/jewuleg.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/vivodev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/97147047885.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/27234333462.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/xoxeso.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_off000087ff.bin
025ac66651b74448861d77e03b1e218ef3fccfbd88580a94676905d8277c248c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FF 4852 bytes
font_01_sfnt_off0000989e.bin
b01b9a9b60eb24a4584408a9f80cefe9682ed4d51c707b836d9dc8c7e6363c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x989E 15000 bytes

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