Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e069f4f1e9ccc22…

MALICIOUS

PDF

43.9 KB Created: 2020-09-01 10:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9175a48982c57cb9e3b2ed335820bcea SHA-1: a49419f5516a8e06e4253fdeb5f389f59bb52146 SHA-256: 2e069f4f1e9ccc22d8374d8be67d6ed19209e09108f3df29877a6db3ba4375ed
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with the primary heuristic identifying a malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'adding rational algebraic expressions worksheet with answers' and the malicious URL, suggesting a lure to disguise the malicious intent. The file also contains a large number of links to shopify.com, likely part of a link farm to improve SEO for the malicious redirector.

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.ru/wix?keyword=adding+rational+algebraic+expressions+worksheet+with+answers
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/tamil_thriller_movies_2018_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/50883943428.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/ganorejin.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/36557541451.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/dewalt_dw705_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_38d88a5e05be4ae1b94398722fe55f31.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b1d0a83b5f24a71985914db063d5bbf.pdf
    • https://static.usrfiles.com/ugd/299074_34582653b55d4cf79c4b4881e8def80d.pdf
    • https://static.usrfiles.com/ugd/cec570_7f3c53c42015417e88d17bd1ddff9bd9.pdf
    • https://static.usrfiles.com/ugd/87a178_0b66f9b8df9348a3ae5a1432d1587a69.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/swisher_ride_king.pdf
    • https://cdn.shopify.com/s/files/1/0437/9538/2429/files/martha_graham_biography.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/96674914712.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/29067986951.pdf
    • https://cdn.shopify.com/s/files/1/0439/1151/2232/files/legipadozikuxad.pdf
    • https://static.usrfiles.com/ugd/0f1814_c3f7e8934f6c4efaab7753eb57a2d243.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_3cc77ca81a534d25959e0e72e9305832.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_a09b4ffd3ee14fa09b7e6c10b7e86fd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7fd5eb66e724477a6d0ce2aede06bba.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_off000063ce.bin
fb4e3c75c4c66803d61451c7c41b778280b16db82c923db03c10feab85b190f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 5688 bytes
font_01_sfnt_off0000772f.bin
f8b35be43ec65b2679c309910e488124124f41b3e58058d738ee182be30152c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 13524 bytes