Malicious PDF — malware analysis report

Static analysis result for SHA-256 437f258c20a0d955…

MALICIOUS

PDF

47.5 KB Created: 2020-08-03 14:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c117112fb48d23ddc8ed791c6e735d3 SHA-1: fd79a83e76b4c71bde84345dd446325f0a8880c1 SHA-256: 437f258c20a0d9558fdbe003cca9eaae9c00001099bdfbfecb486dcf965b3002
120 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 sites, indicating a link farm or redirection strategy. One critical heuristic firing identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'accountancy class 12 pdf download' and the malicious redirector URL, suggesting a lure to trick users into downloading unwanted 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.cc/pify?keyword=together+with+accountancy+class+12+pdf+download
    • http://files.pendleystudio.com/uploads/1/3/1/6/131606968/sodofe_vipisemabegosa.pdf
    • http://files.chronicpainandlife.com/uploads/1/3/1/8/131871740/2318623.pdf
    • http://files.mesivtafootball.com/uploads/1/3/2/6/132681824/5058287.pdf
    • http://files.meaningfulmathmoments.com/uploads/1/3/0/8/130874652/kaxiwatoraf.pdf
    • http://files.kegoodrich.com/uploads/1/3/0/9/130969150/7225754.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/jepawesesilip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/59607308210.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/85633979748.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/48421083876.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/tetajosazix.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/58354385231.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/5525645443.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/logugaxajuxobunopawup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5288/2330/files/90154884390.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/92468601075.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/bijuzojinaxuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/gipanapukanutedegajikosix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43545787384.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_off00007856.bin
1c1f6ec80a769a16fcc6379ddb45d85b1ffdc5aa6fc5eb402576e428d989bdb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7856 5744 bytes
font_01_sfnt_off00008c03.bin
34fced2b37fcb3cdbb65d49ebf3d997fc1b09c78b9ee5dea104b1374a8bb0e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C03 11036 bytes