Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b9b3373c6d80d3…

MALICIOUS

PDF

36.4 KB Created: 2020-09-10 23:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf9edbda716934d6ca9027b3cfec58d SHA-1: 686197deca469a285bea019f757de8e313733924 SHA-256: 46b9b3373c6d80d35177ec02444d7d04aca251a2883e46765226d1b73af242af
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are flagged as malicious redirectors or part of a link farm. The document body, though partially corrupted, contains text related to 'using connectives worksheet ks1' and the malicious URL, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious infrastructure.

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.me/wix?keyword=using+connectives+worksheet+ks1
    • http://sawin.kylecarrollart.com/uploads/1/3/2/7/132740449/3526163.pdf
    • http://files.samwang.com.au/uploads/1/3/1/3/131380687/voxokagiwefetel.pdf
    • http://fukonu.friendsusa.org/uploads/1/3/0/7/130738531/1410205.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/fesilijulexogotureboduv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/avast_free_antivirus_updates.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/microservices_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/enlaces_glucosidicos_como_se_forman.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3b48d59ede94b7883bcbf356d67dda8.pdf
    • https://static.usrfiles.com/ugd/3b7182_d27494592ca84c47ade8066175f02f7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_440de4ebf1b74d029d3a641760ac66de.pdf
    • https://static.usrfiles.com/ugd/cafc24_2a9d4b2695d942458901f99c2ffb4d1a.pdf
    • https://static.usrfiles.com/ugd/8ac1ab_e2e8b0dea3c645c0803f7c7771f99791.pdf
    • https://static.usrfiles.com/ugd/b8c837_8074e4e6fb15479d8a3e200b9c09d4bb.pdf
    • https://static.usrfiles.com/ugd/f9fac6_1a9e736a68884578918d0a3da5baef5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b843f1e83749d39fba0c89e809f944.pdf
    • https://static.usrfiles.com/ugd/3ed902_f8391b09c3c6495aae9bcc64db3c5093.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_off000050bf.bin
1edd9c0fcf585e56de1ed87fe298bcde1f8d8513b407ce2c694337031cd61067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50BF 5076 bytes
font_01_sfnt_off00006227.bin
12dbfa116f00aca7ef6fd29b255764fa6eeedf1de54e3c03ec4ee0132da80616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 10192 bytes

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