Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f739f500b65854c…

MALICIOUS

PDF

44.1 KB Created: 2020-09-02 07:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a2714001302ed038d183abebe3a0a93 SHA-1: 3b04c05dfdd9dfc2cafeb540a728ccb2722535b0 SHA-256: 1f739f500b65854cf05100d5f946bd1bc62cffe0d4b4f375f1a55de90ab11dae
150 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, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Android tv 4k media player app' and the malicious URL, suggesting a lure to entice clicks. The primary malicious IOC is the redirector URL.

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.me/wix?keyword=android+tv+4k+media+player+app
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/zitari.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/albeniz_granada_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/7292763947.pdf
    • https://static.usrfiles.com/ugd/5b9a87_e5fadd7b815c4ea8a315bd48b7711f12.pdf
    • https://static.usrfiles.com/ugd/6cf392_bf8797884fe54053ade49fca9ae5ebb0.pdf
    • https://static.usrfiles.com/ugd/b98abb_197662545e4341fa8ffcb5fca5360d99.pdf
    • https://static.usrfiles.com/ugd/115d6e_2f741f9c88aa4def85911ad00b978a53.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_1a0cccaea5b04b3188c5dcb5d85c6351.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b09d0ef47d445bb7a58f12c76a5975.pdf
    • https://static.usrfiles.com/ugd/4b7290_f4b825f8a5884c62a4f50ede2ea6763f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/lutagubunu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0057/files/7_agents_of_socialization.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/remyzero_save_me.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/furul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/fannie_mae_second_home_purchase_guidelines.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_off00006f7c.bin
ae8a4dc4ad76e92fe479c7fdf7bc79e988343ddb81642dc2c8452f22b2a803df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 5232 bytes
font_01_sfnt_off00008146.bin
aa6378e6252b74775509a3670661479c4594a4b558105cff688138a7232e2671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 10068 bytes

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