Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc1b68e95af6a40…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 05:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca5b3e41d647bf6666dbfd4ccb506e1 SHA-1: 32f5c581a8efbc0202758b1a300f1b17ad0b8889 SHA-256: cfc1b68e95af6a407279a103e30eec2ef086e84c6208e59a4cd44697fad77e8e
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body itself appears to be a lure, referencing a '12 month gantt chart excel template', which is a common tactic to entice users to click on malicious links. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content.

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.com/pify?keyword=12+month+gantt+chart+excel+template
    • http://files.nadinebertalli.com.au/uploads/1/3/2/8/132814136/17731.pdf
    • http://files.closeandpaschalauction.com/uploads/1/3/1/3/131383283/9528199.pdf
    • http://sidas.maniabarbara.com/uploads/1/3/1/4/131452954/dotimudasipupa-tobaxa.pdf
    • http://files.brcarea18.co.uk/uploads/1/3/1/8/131856158/xafugotuj.pdf
    • http://files.miramissions.org/uploads/1/3/1/3/131380258/9342009.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/vufulaxosobazatigaxezixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gopag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/87093956252.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/baseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/bewosetitavasipejokilizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/xitopasedunupodudukas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/application_form_samples.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/85155754557.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/vawim.pdf
    • https://cdn.shopify.com/s/files/1/0436/7866/2809/files/precalculus_grade_11_teachers_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/6385216917.pdf
    • https://cdn.shopify.com/s/files/1/0429/7913/1551/files/64983647153.pdf
    • https://cdn.shopify.com/s/files/1/0437/6340/0861/files/before_and_after_number_worksheets_for_kindergarten.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006890.bin
0058376ca9176a800a292bf599ebbe52cd38c32bb601b4f8313b086a83bd02a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 5328 bytes
font_01_sfnt_off00007a79.bin
ee448ea0b942f8e3cc7ddfe0d5dc4c7c6f0a1a62bc92910c35c663b4662f014c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 2188 bytes
font_02_sfnt_off0000847e.bin
3b550b9e2da33cc4647e2c5296134283123ab38ce395056b7ab290647cef030f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 10584 bytes

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