Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c2f3fd61c8a38e…

MALICIOUS

PDF

34.2 KB Created: 2020-09-19 05:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9db7c8387fa1510b96be11fcb77764 SHA-1: 8c010d5194c74fe00c036ab4f2e85eaba79ec7c9 SHA-256: f9c2f3fd61c8a38eb8ece109fca0a1b70e3bbc2441b9e4acfa621a75b89ba5da
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a 'PDF_SEO_LINK_FARM' and another flagging a link to a known malicious redirector. The document body contains garbled text but includes the URL 'https://ttraff.com/wix?keyword=daily+language+review+answer+key', which is also flagged as malicious. The primary attack pattern appears to be the distribution of numerous links, likely to manipulate search engine results or to lure users to malicious content.

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=daily+language+review+answer+key
    • http://files.kudratforever.com/uploads/1/3/0/8/130814980/8b18e321a5c21.pdf
    • http://files.splashcitystudios.com/uploads/1/3/1/4/131453615/4eb1ef3.pdf
    • http://zutusawu.academicsuccessblog.com/uploads/1/3/1/1/131164250/xalepijuxuti_bexuju_semoki_ladipovefofikuk.pdf
    • http://miwegabof.tracyvogtdesigns.com/uploads/1/3/1/8/131856917/11f6f97445a4e1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/parestesia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/8167559618.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/63565354532.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/45136410.pdf
    • https://cdn.shopify.com/s/files/1/0434/3382/0322/files/ccri_by_upma.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/budomu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/standing_outside_a_broken_phone_booth_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/sengoku_basara_4_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/autism_spectrum_disorder_review_article.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/80666083405.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/heel_and_toe_polka_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/latogetazilab.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_off00004824.bin
68984de5130da3a3b43ad1ce00b0b539d5a8b837dea9861a5a512acab1f3433d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4824 5168 bytes
font_01_sfnt_off000059f3.bin
061fa64b4759c3ce4b8d19ff24a0128b48f9f0da773969fce0d290392e6bb116
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 9912 bytes