Malicious PDF — malware analysis report

Static analysis result for SHA-256 54141214be9f1ad2…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 17:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9faba0d52508b9873f125b895757fc94 SHA-1: 9ae3c65c918ac257a472a63f064d03db3b342731 SHA-256: 54141214be9f1ad240da6eda70ffaa23223073348263fc1d5ace759102283318
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=low+voltage+regulator+using+ic+723+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm SEO tactic to obscure the malicious redirect. The ML classifier also strongly flagged this PDF as malicious.

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=low+voltage+regulator+using+ic+723+pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/50244683988.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/3873000085.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/91672795341.pdf
    • https://static.usrfiles.com/ugd/5e81b9_c42e1393e69f4d67a8109e4d9827521b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b1e24127d5c4175b889c175a960c520.pdf
    • https://static.usrfiles.com/ugd/f1d680_e23faec087194911aa69e9bc6e0456e7.pdf
    • https://static.usrfiles.com/ugd/89363e_034e84cc469149648fed2883c6f493a8.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9932/files/42201756584.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/liniluvujujepexu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb0.bin
52b32d9b35b6c55d29dd53afa90ea1df16cd2c12f594d8af50437e8e0ba0f9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB0 5672 bytes
font_01_sfnt_off00007333.bin
ed7ad265d09e20e9811b60a6c334c421cbe1cfb888f237fe1c4ab08c22b7b2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7333 10052 bytes
font_02_sfnt_off00009564.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9564 4324 bytes

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