Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a531b09f7f1c51…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 06:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea52081eedce3217b575f819eaa861f SHA-1: ee54ab409d2c448bf7a391973d6611b4a40240f2 SHA-256: 23a531b09f7f1c519ecc9770a78659d30296a17c55817e0fc8a9e4e5b2c004f0
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The document body appears to be malformed or obfuscated, but the presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites. 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=castor+informatique+s%2527+entrainer+2016
    • http://kixod.flexypakofli.com/uploads/1/3/1/3/131380983/175171.pdf
    • http://jafini.drlchen.com/uploads/1/3/1/4/131407901/8939f5b2.pdf
    • http://files.allaboutherexpos.com/uploads/1/3/0/7/130775145/veluguwikofala.pdf
    • http://xetit.northshorejewish.org/uploads/1/3/0/9/130969060/46b722eb0040c03.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4893/files/99695105853.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/acls_manual_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/barbie_doll_clothes_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/second_law_of_thermodynamics_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/78052881224.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/dead_trigger_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/womidexukowuxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/what_is_a_slug_in_wordpress.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/jevoviresifezokikevowusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/towise.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_off00005f44.bin
33f2561321ecf1c44edfe23b7f9fc010d9d24262745b9709ed377ad833a7335a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5428 bytes
font_01_sfnt_off000071af.bin
7ee460baafd59e3f47e4ee745905077a563f8300346d07e06caa218bf98750b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AF 10120 bytes

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