Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ceb5cc52fc4647b…

MALICIOUS

PDF

40.0 KB Created: 2020-08-25 17:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507f3247ecb3b58ac5aaa2c130f09b9b SHA-1: c2edb42d5e0fdf4ee06f1a4371027c9caeb90fc5 SHA-256: 8ceb5cc52fc4647b20e082d116edd8001c000baa44e9827d466fc53ef595fb38
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cerita+rakyat+malaysia+pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to various PDF files hosted on domains like cdn.shopify.com and other potentially suspicious domains. This suggests the primary attack pattern is to lure users into clicking these links, which likely lead to malicious content or phishing pages.

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/pify?keyword=cerita+rakyat+malaysia+pdf
    • http://bixused.maeganabel.com/uploads/1/3/0/7/130739415/a5c4b6dfe4070.pdf
    • http://files.oestore.shop/uploads/1/3/1/4/131406173/962837.pdf
    • http://nakitoxon.alcoholdrugevaluations.com/uploads/1/3/1/3/131384635/venazoxemuzebafibog.pdf
    • http://files.pixpeel.com/uploads/1/3/2/7/132740296/fofitazivoni-sasakewosu-dineb.pdf
    • http://files.ivepriest.org/uploads/1/3/0/7/130775009/52dcad8c.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/sociology_notes_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/57438015362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0458/2709/6739/files/chipboard_sheets_bunnings.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/the_way_we_were_barbra_streisand.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/mugexejodagisimux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/12536715721.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/muladigorotuvisoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/11477684342.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/tegenevolarefilijokunaken.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/nidamal.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/equivalent_fractions_worksheets_5th_grade.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_off00005ec4.bin
b6f74d19baed3e568ebe1e794657f8af83e0c3b2fd8b5219586f1791a31d8fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC4 5256 bytes
font_01_sfnt_off00007099.bin
0a10007bbb912f508886fbfd661d6e2fa741ab89521caca8500511ec69797b37
pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 10076 bytes