Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b6865563a2b7f2…

MALICIOUS

PDF

35.6 KB Created: 2020-08-05 01:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aaa859d572dfea12fcf2a06d452389e SHA-1: 631d1ff8adeda99ae445ae944ac0ca1206ccf911 SHA-256: b4b6865563a2b7f2d3fdb7dc0e608aaa07305839c89412543004a36f7190db1c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'letter format in marathi pdf' and the malicious URL. This suggests the document is designed to trick users into clicking the malicious link, likely leading to a phishing page or malware download. No scripts were extracted from this sample.

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=letter+format+in+marathi+pdf
    • http://files.teamgodent.com/uploads/1/3/2/6/132696155/cd3f9aad01.pdf
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdf
    • http://files.mindyourbodyfitnessandnutrition.com/uploads/1/3/0/7/130740298/4755157.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/gerafofubup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/lakogexuxofagita.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/gijuda.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/58897561292.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/96333330051.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/26783981228.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/53022229540.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/tudanurugevofemufibasik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/razutomoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/rabeliwotijimujulazofux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/58669228568.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_off00004db0.bin
3bee64283391fd7c98ced095d632e82d57842d2a36fec93c4f3ed55adb5381a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB0 5012 bytes
font_01_sfnt_off00005e93.bin
b4bcd7b531a7c979f12bd1bbf6206bf92f304231ef29f5ae82f42c3980af6ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 10340 bytes

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