Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb298c4ec2f472e2…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 03:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687fe7235125aa4bf57eae9bc0258911 SHA-1: d7e02717ebcf659301c53b477467262f2d57bf00 SHA-256: cb298c4ec2f472e2a48fc1f174d542cb4fcbe05a5f97ba59996c3ec5858ea54b
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'copy reading exercises with answers pdf' and the malicious URL. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the primary malicious destination. The primary malicious URL is https://ttraff.link/pify?keyword=copy+reading+exercises+with+answers+pdf, which is likely used to redirect the user to a malicious payload.

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.link/pify?keyword=copy+reading+exercises+with+answers+pdf
    • https://static.usrfiles.com/ugd/b88e3d_f1e65a311ef940e9aa2cc48e9a5d162e.pdf
    • https://static.usrfiles.com/ugd/24853a_688983a5d66d460d97c54a2dc34bb236.pdf
    • https://static.usrfiles.com/ugd/44b221_3c230e4163b74532812ffebf4027f338.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/tshivenda_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/37272274350.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/voltaire_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/79882911802.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/payaliya_bajni_lado_piya_song_audio.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/rezimobivasufe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/46287586591.pdf
    • https://cdn.shopify.com/s/files/1/0438/1828/7266/files/android_developer_maps_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/30315700999.pdf
    • https://cdn.shopify.com/s/files/1/0428/4140/7644/files/degumasexedorokelovav.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_off00006a55.bin
1d1717f350a3341ce3604934481282b05812ea49f510b8b819bee90920d81edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 5552 bytes
font_01_sfnt_off00007d51.bin
7394de84c6327025c8d785b3966bec5f6e143047eb3a624282e43b2b24f2ab6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 10604 bytes

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