Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e2ca24c9d178ed…

MALICIOUS

PDF

47.6 KB Created: 2020-07-27 18:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b0b6ed3bec11cdb836a5a1fb38f546 SHA-1: 68469c90cb68f73192fb0eb81761a02076807c8d SHA-256: b1e2ca24c9d178ed36fdc6a94067e86d0e861bf4dc238c2f661da402ae68193c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a high number of embedded URLs, many of which point to a link farm hosted on Shopify. One critical heuristic identified a PDF link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The document body, though heavily obfuscated, contains text related to court case information, suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=shelby+county+tennessee+chancery+court+case+information
    • http://files.nicolagiuliato.com/uploads/1/3/1/3/131379820/wumexasu.pdf
    • http://files.heryellowribbon.org/uploads/1/3/1/4/131410685/liwipefizosapenubad.pdf
    • http://files.joebates.co.uk/uploads/1/3/1/3/131380467/e7f0e99fa109.pdf
    • http://files.hvswug.org/uploads/1/3/2/3/132302787/wutudavepowuvosiwiw.pdf
    • http://files.salandtalerotica.com/uploads/1/3/0/7/130739544/01e6210b.pdf
    • http://www.alternatiff.com
    • http://townofarlington.org
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/gojavizulexifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/lojipidowejovetuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/kitobizifedaselixexoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/ruvikodisutetovipogan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/joxoxonurojijataniwigob.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/47846645255.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/nipagutiwejepubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/mobojofat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/loxetapamugadogiwubuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/57340612698.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/kanejopefizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/38201490436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/bumileki.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/
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/ruvikodisutetovipog

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ce.bin
5bec51e4f57d3918cb435f188f17ccfccebf746aa17c7dee72f4b674cb83186a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 5348 bytes
font_01_sfnt_off00008ac8.bin
db4cbfc967de9118a2328d32881329c20eaeeb57a475b0c312f8ade9807e7ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 10468 bytes

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