Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ea22a85bcd7ab7…

MALICIOUS

PDF

40.6 KB Created: 2020-08-15 01:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a711d09275bd94b52f2274b62176c431 SHA-1: 449a35919453ea57baf1588fa6eb6b33144e6bab SHA-256: b9ea22a85bcd7ab7beec63c7eb9c4f48790c6d3c056072acbc32ac4cf373f267
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a PDF link farm, indicating an attempt to direct users to harmful sites. The document body, though heavily obfuscated, contains text related to 'imf report on fossil fuel subsidies' and a URL that aligns with the malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains but also including suspicious domains, suggests a broad distribution or SEO poisoning strategy.

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.ru/pify?keyword=imf+report+on+fossil+fuel+subsidies
    • http://roxodewor.yiechan.com/uploads/1/3/2/7/132740805/somojosofo.pdf
    • http://nororil.normanmardigrasparade.com/uploads/1/3/1/0/131070442/pepikifik.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/81381161244.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/najipajiritigigoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/12114288440.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/rajojinowan.pdf
    • https://cdn.shopify.com/s/files/1/0435/6341/7759/files/ketiwufegazurid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/18394847746.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/rupagelabavujeviro.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/excel_vba_worksheetfunction._match_range.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6074/files/segadamajaxibos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/halimbawa_ng_barayti_ng_wika.pdf
    • https://cdn.shopify.com/s/files/1/0433/8765/0211/files/47342867868.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_off00006166.bin
97c16c140c5197d50e2ea8b13980ced6e728d3e72e962642bedcfbb60547f56c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 5056 bytes
font_01_sfnt_off0000726b.bin
18b00d3a4df6fed564e1424e18d758584a0d11d42c4327e09bc8600e53be1166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 10408 bytes

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