Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dca1888b97faee7…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 08:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e782a920bdf3ce8f99a765e2b6a5b8 SHA-1: f4a74c9621be50fe07fb3d8c1cf99baa4ed679c6 SHA-256: 9dca1888b97faee7e9827ce70e9f5e4fde624c5fe20b9685bef8b3e281d00259
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as information about a Cavapoo breed. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on static.usrfiles.com and cdn.shopify.com. The presence of a malicious redirector and the mass linking strategy strongly suggest a phishing or scam attempt designed to lead the user to 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.ru/pify?keyword=cavapoo+breed+information+uk
    • https://static.usrfiles.com/ugd/4cf28d_7768a78d8fd143bc86b01163e2da14ff.pdf
    • https://static.usrfiles.com/ugd/b3bc21_0765e40e6e504592b8da6535761168d0.pdf
    • https://static.usrfiles.com/ugd/9421c8_f7f2b8fd3f234816a84ae19d323ee31e.pdf
    • https://static.usrfiles.com/ugd/ad2ade_74aee4c26b644b4788e3d243886b40d1.pdf
    • https://static.usrfiles.com/ugd/cafc24_ca80012e94f449139361082fba7b75a8.pdf
    • https://cdn.shopify.com/s/files/1/0437/7814/6462/files/jogilolumabapenabube.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/tejowivuwixobimon.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/12645969359.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/xuvujilomipuzijupejen.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/mechanical_estimation_engineer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/44146065523.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/92810845501.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/burazuwuguv.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/94430539427.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_off00006c17.bin
286d25b47076c1026624e1e43f9fc79306b2f1b41ea308e4074619c486ce5531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5148 bytes
font_01_sfnt_off00007d82.bin
3d38f84f8b7812759684d3d1dd2c7946f3550e50f4ef363d39a1542dd26a1a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D82 10308 bytes

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