Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ed8e6771e7cae6…

MALICIOUS

PDF

42.4 KB Created: 2020-09-11 04:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043265705476702ad2eafb9ee452eece SHA-1: 0df382f4fde33ffd0124408dfba071017b4d89f4 SHA-256: 45ed8e6771e7cae636ffc9593aaaf437812fa8badb4c56428894956ec7bfd2ee
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'plate tectonics worksheet high school pdf' and includes URLs that are likely part of a link farm designed to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=plate+tectonics+worksheet+high+school+pdf
    • http://files.wscministries.org/uploads/1/3/1/4/131438692/detakeravilap.pdf
    • http://files.simplysouthernfoodie.com/uploads/1/3/0/7/130739062/bowigugow-zirexefununeg.pdf
    • http://kekevo.edgeprogram.info/uploads/1/3/0/9/130969644/mubudobuvivukoxu.pdf
    • http://files.katebond.org/uploads/1/3/1/8/131872178/48cb54.pdf
    • http://files.gemstonegirls.com/uploads/1/3/2/6/132695633/8127632.pdf
    • http://files.atthefeetofjesus.net/uploads/1/3/1/4/131437984/9066932.pdf
    • http://zezalapef.fcwellnesscompanyltd.com/uploads/1/3/1/4/131438759/9305682.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_b67aff1d999142468d5c28866688432c.pdf
    • https://static.usrfiles.com/ugd/5f5755_630e8373facb4cada6ddd6c66fc8251f.pdf
    • https://static.usrfiles.com/ugd/50c35f_27151b5805564b6f9aae52fa867b1d3e.pdf
    • https://static.usrfiles.com/ugd/4d400c_46e28b14bb3f43439ad068df39a824e7.pdf
    • https://static.usrfiles.com/ugd/0b46e6_0e91740374e94e09af575a924d9ac373.pdf
    • https://static.usrfiles.com/ugd/b8c837_765b813be39641e098dfb3974e2d5643.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_3d74f6111dcf4d3a960c2433ff70496a.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_off00006740.bin
d1d9a20953ddb0db489de7732c32781b0c73cc8d4f681cd58e5fed75bcc55ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 5576 bytes
font_01_sfnt_off00007a44.bin
2762e4e3d75b5a754285314a03d13f524c3ccc4e042cf139ba96c88841daba01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 10084 bytes

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