Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a0a7aec050f2a7…

MALICIOUS

PDF

59.4 KB Created: 2020-09-03 09:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4995b4f723e1a63a437df2d6da356683 SHA-1: 47623e4bb6547da8156821619a537c4bd6d886d4 SHA-256: e7a0a7aec050f2a70ddcd7e6a13390bce655bac146c3ce26af97ffcadb7e19ef
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=inequality+to+slope+intercept+form+calculator'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on static.usrfiles.com and cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The primary malicious intent appears to be redirecting the user to the 'ttraff.me' domain, likely for further malicious activity.

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=inequality+to+slope+intercept+form+calculator
    • https://static.usrfiles.com/ugd/87fdc7_aa5977c23abd4f128dcf7f9e86fe8719.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d30e0782288c4019907e336ebcd11705.pdf
    • https://static.usrfiles.com/ugd/aec2ea_77c2cf94120e49688544f85e98437c2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_95c7f6ad57df4bddbf3a866824462b2a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/12430829609.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wugujaran.pdf
    • https://cdn.shopify.com/s/files/1/0439/5833/7694/files/adobe_after_effects_cs4_tutorials_for_beginners.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_off00009deb.bin
fc8581c8b5bb0cd03a6e4957337437920a07ef60599e68e42edbc6edd128957c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEB 5208 bytes
font_01_sfnt_off0000af92.bin
a09c996764976fc25832972d02edc60a8c03a47afd1c98ac1c790667e0a445ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF92 10436 bytes
font_02_sfnt_off0000d30a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 4324 bytes

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