Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da50af527385a3f…

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 00:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe20980eff7dd5665cb8567d1a08f813 SHA-1: f501a8ce1df68c8a138de680f7490688cc1ea371 SHA-256: 4da50af527385a3f917481b39962cf1aa4f6257073f58dd7f88513d2c6c1d0fd
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, a technique often used in SEO link farms to manipulate search engine rankings. One of these links, 'https://ttraff.cc/wix?keyword=snl+bird+family', is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous benign-looking Shopify links alongside the malicious one is a common tactic to obscure the malicious intent.

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.cc/wix?keyword=snl+bird+family
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/children_s_alphabet_picture_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7805/files/osmosis_and_diffusion_lab_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/leritaperixexuvelowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/7227193834.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
    • https://static.usrfiles.com/ugd/4d935e_a3845302097c4cb3ada6ee84964490f9.pdf
    • https://static.usrfiles.com/ugd/01bc73_aa451dba6cba4cb793708f11a1b71e18.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_96fe248f782e4136a70fd1252649cd15.pdf
    • https://static.usrfiles.com/ugd/b8c837_5862d2c5c5884edd852281edacd75649.pdf
    • https://static.usrfiles.com/ugd/cc14e4_45307a0fdf2b4f87952760d64861afe9.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/25583505005.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/gijavuzejofado.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_off00004c33.bin
d9e83a995193082e1ff6551965b6fb34204e4684061f89adac5f80ae1518a5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C33 5220 bytes
font_01_sfnt_off00005de2.bin
1b7f3320b35e138d3e49471de3c3a748377593a3385ba16c9cdc132434230a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 9832 bytes

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