Malicious PDF — malware analysis report

Static analysis result for SHA-256 226c14923590d341…

MALICIOUS

PDF

45.5 KB Created: 2020-09-05 00:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb2ade0b823bc353ffc5fcfe5a656ae6 SHA-1: 8263957968387bc011eb860013a0a305000e2149 SHA-256: 226c14923590d341067d7912560c54c9fb151aab1d996b674c75f26fc48023d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.me, which is disguised as a list of free movie sites. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and keywords related to free movie sites, reinforcing the lure. The presence of numerous external links suggests a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=free+movies++sites+list
    • https://static.usrfiles.com/ugd/f1d680_16fe088965ae4326bb516f69a937f1f5.pdf
    • https://static.usrfiles.com/ugd/90423f_4737c6b7beb04973a42b040f30fe472e.pdf
    • https://static.usrfiles.com/ugd/cb2bed_64afc31d32004f48b5e7efbda737abe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2696a5a2f9b648429e92b8c5f263b713.pdf
    • https://static.usrfiles.com/ugd/b8c837_c05f146b81c2431ca25b7161eda455d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_072b4975e4c64ac4a3ebded16938a1e0.pdf
    • https://cdn.shopify.com/s/files/1/0458/6428/8409/files/subano.pdf
    • https://cdn.shopify.com/s/files/1/0433/3538/5243/files/beniduxina.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/pawidozozubev.pdf
    • https://cdn.shopify.com/s/files/1/0459/9126/4413/files/vcut_kitle_indeksi_nasl_hesaplama_forml.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/66450346015.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/kojalanadopup.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_off0000755e.bin
7e0f0504cfafedc8f8bf2b5cd39e48f653e44b004fdfd2b8370356338d58fd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 4636 bytes
font_01_sfnt_off00008514.bin
d5a3220ff43a7357d9f2b5e6c5e79acc5496ce2b55c62d66b983f2f5e8ec9e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 10592 bytes

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