Malicious PDF — malware analysis report

Static analysis result for SHA-256 e098e8b38d7f21fe…

MALICIOUS

PDF

42.6 KB Created: 2020-09-17 01:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8742829a5e2aa18195d10797ab03c5c6 SHA-1: 9676c9f68df452b2d958d9f7a923f3f59441505c SHA-256: e098e8b38d7f21fec72b440334ef6d8a41d829c959697a31a17c46bf6248177a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=earthquake+activity+worksheet+pdf'. This URL is presented to the user as an 'Earthquake activity worksheet pdf'. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to disguise the malicious redirect. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=earthquake+activity+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/93268032064.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/71030046265.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/24021669822.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/dujonenomizadowilidun.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/wowowelifamisolanat.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/11822935502.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/altogether_and_all_together_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/13108389694.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/lagrange_s_mean_value_theorem_proof.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/bivajus.pdf
    • https://83a72512-03ed-4a70-bceb-d60bd97169f3.filesusr.com/ugd/4bb894_a371fb5cc20e4104831fdc9e11cbeeb2.pdf?index=true
    • https://71110fd0-6fa4-4d5b-8aef-78ec7d1bd49c.filesusr.com/ugd/70e7d4_9722cfac66ef448495c4d20123182d84.pdf?index=true
    • https://c049b144-5318-454f-bfda-4de9b97695a8.filesusr.com/ugd/66f3f9_c6b4d4088dc7460bb772f910ed2a8232.pdf?index=true
    • https://0672563e-ee0c-4fc9-9432-dc9ecbf82fa9.filesusr.com/ugd/008e52_00b83d5dcf094357ba6403b69b724eb0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/pazuketekupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/rikat.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/my_cellebrite_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/65557171061.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_off00006645.bin
6f49c5a6a0bf116654af1e2ed908f983a78915dc20fb371e01e9ab2f859de631
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5612 bytes
font_01_sfnt_off0000797c.bin
7ebced2cb1366eb4d5b226d2d8ff0787b1c1bc8be1622e52371d5e7a4c602c0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x797C 10412 bytes