Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33ae0a329e8c6d2…

MALICIOUS

PDF

36.9 KB Created: 2020-08-08 01:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9efc6d6ae3a240498bb59e2875ff4c63 SHA-1: 6bb1a32be677356c1bcefff76bc652604a03f598 SHA-256: a33ae0a329e8c6d2cc2438ec69e22b464cf0d7aaae14ec991f5c0fab34b23e72
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=master+swing+trader+pdf'. This URL is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, also contains this URL and references to trading, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or content stuffing technique to potentially improve search engine ranking for malicious content.

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=master+swing+trader+pdf
    • http://files.thirdstreetchurchofchrist.org/uploads/1/3/1/8/131857305/7347697.pdf
    • http://files.camiltyequestrian.co.uk/uploads/1/3/2/6/132696015/990563.pdf
    • http://files.hubcapanniepky.com/uploads/1/3/0/7/130739593/428a62bb.pdf
    • http://files.taoacupuncturemarin.com/uploads/1/3/1/6/131606727/6440127.pdf
    • http://files.joelmara.com/uploads/1/3/0/8/130814353/9978a.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/25331754079.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/branches_of_biology_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gozutalozarugub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/10134336700.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/suduvafafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/7266336473.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/73882836563.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/91627711904.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/gate_2020_ee_paper.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_off00005356.bin
287485d937f6c4d0fdb26b5f8aa2f721a180e7f06f4396531bca4106dc34e980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5356 5276 bytes
font_01_sfnt_off00006574.bin
6941a3f4a45c8cbf2c4135d461638d6d45ee77676fcca01d335bf307e3d4ec8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 9748 bytes

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