Malicious PDF — malware analysis report

Static analysis result for SHA-256 418d4c105cac0d2c…

MALICIOUS

PDF

47.6 KB Created: 2020-07-22 19:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f967c84ed43a9be719efa55aae5050 SHA-1: 52094cadac9d641bfc3dfc8c5556dcf58bb8376e SHA-256: 418d4c105cac0d2cf466a5789a30f287fc09510769a090c2f7b1139f0bbe8ec6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the embedded malicious URL, which is likely intended to deliver a secondary payload or conduct a phishing attack.

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/wb?keyword=ditadura%20militar%20tortura%20pdf
    • http://files.oilsforlove.com/uploads/1/3/0/7/130775018/610c70310bca0.pdf
    • http://files.ivcoalition.com/uploads/1/3/2/6/132681315/8791b2e8a3.pdf
    • http://files.lscreativedesign.com/uploads/1/3/1/6/131636941/fizet_lanufegawapa.pdf
    • http://files.bournemouthoutriggercanoeclub.com/uploads/1/3/1/4/131437064/losesubexogomulareju.pdf
    • http://files.merutech.com/uploads/1/3/1/4/131410370/da187e.pdf
    • http://files.merutech.com/uploads/1/3/1/4/13141037
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/ruxuvopaxurifiwelepezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://kunerudif.files.wordpress.com/2020/07/28877337681.pdf
    • https://pilixebuf.files.wordpress.com/2020/07/43286064402.pdf
    • https://pikilaguse.files.wordpress.com/2020/07/tetibekisuwazuwutabo.pdf
    • https://pewinutol.files.wordpress.com/2020/06/doxobako.pdf
    • https://runaxebeja.files.wordpress.com/2020/07/wivanakepozenipixadevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/maxomasazaxavufilotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/mobetonikatatirobagekeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/30675004259.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/62891128026.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/xexuriki.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/29472661952.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/gesuju.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_off00007938.bin
d41432a9dfe5f5d6934c6098a722d54e6096b5652ac35513728df60cb79e7b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 4668 bytes
font_01_sfnt_off00008911.bin
3f621895cb49fec9b416b6a9f16c54491b3ab4094f6b60b0cea73387d9551fba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8911 12476 bytes

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