Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67a9683662531e9…

MALICIOUS

PDF

41.5 KB Created: 2020-09-17 10:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76bb2576e4d4648d9460b85b5baf7452 SHA-1: 25d305d46eb249b20bd6e4b6047bea45b951feb7 SHA-256: a67a9683662531e9402d92adc20f0bdc81185e1625ed06d186f9d67135d101a5
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, indicating a link farm for SEO manipulation or redirection. The document body, though heavily corrupted, contains text related to downloading a graphing calculator, which aligns with the malicious redirector URL. The primary malicious IOC is the redirector URL, which likely leads to a malware download.

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.club/wix?keyword=download+graphing+calculator+on+iphone
    • http://tivat.moregreenthings.com/uploads/1/3/1/4/131407068/zuritimalepame.pdf
    • https://4283a5f3-b5cf-4013-a278-33486ea7302a.filesusr.com/ugd/735189_7fe16acecbb04cb3a529dbc2c7d6a5c3.pdf?index=true
    • https://1ef8ece8-0d08-461e-8b57-7becdcfb6278.filesusr.com/ugd/6f53d7_d524f5b19f9648d4aa462e2ad02d9f73.pdf?index=true
    • https://2bf221d2-f1e2-4ca4-a0c7-2c4525aca948.filesusr.com/ugd/18ee90_020c16c5bd634abea3687cb2b55ac6ab.pdf?index=true
    • https://563981b7-4663-4811-a37c-c6e3589bdfb8.filesusr.com/ugd/33ab24_ad190a08025c4e8394aa4d602a19ffb8.pdf?index=true
    • https://4c638c2c-a6f7-4ebe-910b-a5077acf26ae.filesusr.com/ugd/ecd213_3eca79243c8044baa47df1960208b190.pdf?index=true
    • https://be77efad-ad0a-44c7-915b-4ac52e1c297b.filesusr.com/ugd/cfa91a_4cde400b34214025ba233640e51f3378.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/tax_treaty_indonesia_belanda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/metugesarir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0167/files/gofix.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_off00006430.bin
a2a3b83a88d87f9e4363aa59037e1140a04c39f547a2efc6716a8fb4875db6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 5248 bytes
font_01_sfnt_off0000761e.bin
ac8a21084e2669be6fdd5124541216ebbfd75343c0b675c4a54efa59aa72289b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 10352 bytes

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