Malicious PDF — malware analysis report

Static analysis result for SHA-256 f888d319e9698a92…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 12:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574e4064b159fb3130ad3b3bf1ae0ec7 SHA-1: 0033caef4bb554e6b6b1c93edccd923d13a108b0 SHA-256: f888d319e9698a927caf85665b7d15eb87c40ff5e1e52e58d518674c8813bf7c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to interview questions and a URL that appears to be part of a link farm. This suggests the PDF is designed to lure users into clicking malicious links under the guise of helpful content. 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=how+to+answer+interview+questions+regarding+teamwork
    • http://files.cvubaseball.com/uploads/1/3/0/8/130874359/a0e74.pdf
    • http://files.microcosmetic.com/uploads/1/3/0/7/130776218/6886095.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/lunutebure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32506959796.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/kafupigofokonuvag.pdf
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/catechism_of_the_catholic_church_baptism.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/adalet_aaolu_hayat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/triangle_inequality_theorem_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/gonepurikobetag.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/piweluwuzijirerubabogus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/alia_bhatt_pic_unsplash.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/bearded_dragon_care_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74523611049.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/taxidivofufonasosara.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.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_off000062c9.bin
a4821dda95f4ae06b521b1e181fd1ba81edc4c25b6c06ed3e5100dfedab1c02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5296 bytes
font_01_sfnt_off000074c2.bin
4faa66167acb0cb267ca4cee14b8fe9f73b99b0e93dfc1ef821ae3622eeabc2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10220 bytes
font_02_sfnt_off00009728.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 4324 bytes

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