Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8d05af2dbfda9c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 08:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7803163f3729cc21086139df95c1347e SHA-1: 60db52500c312ae1add3c07aebe9ef1b3acc1122 SHA-256: 7c8d05af2dbfda9c8b5d8af51f8c5f0f74a141140d631882c5657fa200749af5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=was+ist+ponologie'. Additionally, it exhibits a PDF link farm behavior, with numerous links to Shopify-hosted PDFs, one of which is 'https://cdn.shopify.com/s/files/1/0431/3543/4901/files/beth_hart_sheet_music_piano.pdf'. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The primary attack pattern involves tricking the user into clicking a malicious link.

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=was+ist+ponologie
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/beth_hart_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/5355025964.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/99871566117.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/song_broken_wing.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/29025769998.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/20085226863.pdf
    • https://static.usrfiles.com/ugd/136d07_f85daf69b99045e4bee60eb87ef7f67c.pdf
    • https://static.usrfiles.com/ugd/36f25b_85df632c17b14283a857bb14ed706e66.pdf
    • https://static.usrfiles.com/ugd/6908d7_eabd0db3a6bb475e927f59d7cd163aed.pdf
    • https://static.usrfiles.com/ugd/b8c837_58b5d391d825494a9a8833891b854cf2.pdf
    • https://static.usrfiles.com/ugd/10b11f_14cfdbdcb091447d846a394718c4a178.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/critical_thinking_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/rimaribebobugagixotanug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/tezoxipewarejib.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_off000061c0.bin
a06da968643990e599e899934e1d08234957e3e2daf9dab4edd9eea1bee57220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 4904 bytes
font_01_sfnt_off00007295.bin
0e1d79c4fd88e571d90a81411acd2128bf58eba53391355d66a849912fb5165d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 11576 bytes

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