Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b515fc7370c30e9…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 07:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8be4262c8eb911b7e22fe06dc33be48 SHA-1: c1702c922dce5efc301164df12ebb173d4e418b4 SHA-256: 2b515fc7370c30e9c31bc36332fcf9650f2ce3d0780625f9f714505c880213d9
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'best live wallpapers for pc free' and the same malicious URL, suggesting a lure. The PDF also contains a link farm, with many links pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content.

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.com/wix?keyword=best+live+wallpapers+for+pc+free
    • https://static.usrfiles.com/ugd/696117_45795e0fc3ef456ab8787979a851814f.pdf
    • https://static.usrfiles.com/ugd/4dd980_b859e06d507b44c983490d6551586e62.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac75a04afd304700b29211bb448dccc1.pdf
    • https://cdn.shopify.com/s/files/1/0463/0465/7570/files/57074104671.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/bticino_axolute_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0451/0675/7785/files/automatic_call_recording_pro_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/civil_engineering_drawing_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/29733121307.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/shutdown_timer_command.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/ahlam_mosteghanemi_al_aswad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/32072834909.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/dolerijudapefejij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/34663349544.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
    • https://static.usrfiles.com/ugd/804ff6_6b5cf746ee3f4bfd9cf93d5545457b7c.pdf
    • https://static.usrfiles.com/ugd/b13fd1_4f1c2bd0045c40b8b75d877335cbab3a.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_off00006440.bin
565fd61d5fbcc656201209a44cedafd57775057be7356b870183a24b97f4cf8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 5208 bytes
font_01_sfnt_off00007624.bin
d7c3632857ba23addf03b1dfe2b61dd05ea2ddc7a52f915f183f20f61f1990fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 10144 bytes