Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d8cbc1dffcbcf2…

MALICIOUS

PDF

49.4 KB Created: 2020-08-15 18:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b02bf5b24780a5ea544ff2afa91034b SHA-1: 37cae4102939b0deae5f143dbda29ec12377e784 SHA-256: 76d8cbc1dffcbcf23c2df084df2cf83ef385ae4a41dfbb6048bcb4f80455b637
120 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.com/wb?keyword=manual%20maquina%20collareta%20industrial%20pdf'. The document body, though heavily obfuscated, contains fragments that suggest a lure related to an industrial sewing machine manual. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. The primary intent appears to be directing users to malicious infrastructure.

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/wb?keyword=manual%20maquina%20collareta%20industrial%20pdf
    • http://fufon.colourwizards.com/uploads/1/3/1/4/131454046/gatozawovusola_sidale_riworele.pdf
    • http://files.dcjoinery.com/uploads/1/3/1/3/131382406/guxolibafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/gogorosigunugores.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/kilekolatari.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/surakoxutivusotara.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/20646180102.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/sesarimozadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/basic_survival_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/sql_server_configuration_manager_missing_reporting_services.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/15000_useful_english_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6054/files/fuwagepolujagetuzokikodir.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_off00007f03.bin
d6d2b296e70520e2bb8ab6eddd678694980d7f53056a531f425fc415992a38cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F03 5432 bytes
font_01_sfnt_off00009165.bin
156287fa732b8a321c6ceab35fbb2a6e6af7bf099c650a5716837a2012a5e302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9165 11584 bytes

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