Malicious PDF — malware analysis report

Static analysis result for SHA-256 92405c2d9a2c41ae…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 06:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60079128e09c76b8ab70947c57d73081 SHA-1: 71059f961fcd4d10d83e0bd9e6ffc2ce76d1bf64 SHA-256: 92405c2d9a2c41ae37dd1576d5965bd100523e87d91d3e58b03c40213ebec1d4
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.com', indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to an English certificate and the malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector is the malicious link farm.

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/pify?keyword=cambridge+certificate+in+advanced+english+2+with+answers+pdf
    • http://files.leisacorbettart.com/uploads/1/3/1/3/131379894/vokatuti_vetuvudo_fotapumudakix_lisuliso.pdf
    • http://files.dlstetson.com/uploads/1/3/1/4/131437474/zoniviwisibim-niwopowakid-gazow-puzatepupufam.pdf
    • http://xogiwetaw.lipsmonsherri.com/uploads/1/3/1/8/131857631/2628031.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/jaxogokakinedib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/rogepofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/28636937050.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/leraredasoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7236632937.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/convert_to_dxf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2337/files/nerezilerutapisuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/50114054127.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/devira_tamil_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/jaxinujazuvar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/pipufazugagas.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/fejusirugitub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/zuvet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d8.bin
42e94ff400907afd5846f39a1548ce229428665c268e47cdde60c708975fa173
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D8 5696 bytes
font_01_sfnt_off00006823.bin
4ae4961938a1c1283154bb8a552dd2fc894d2986f4de018f8f10cc023e8873de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6823 9992 bytes
font_02_sfnt_off00008a34.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A34 4324 bytes