Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7220efc7fc97deb…

MALICIOUS

PDF

48.8 KB Created: 2020-08-11 12:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4b9bf989801b14b511c513f7faa39a2 SHA-1: 229a3bd71fc19016b0e50abda1ac5ce24d420cc1 SHA-256: b7220efc7fc97deb7ce9a0d092d911b1cf99151c103bed58b31ab951cdf115e7
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains numerous embedded URLs, including a primary malicious redirector at 'https://ttraff.ru/pify?keyword=baseband+6630+ericsson+pdf', which likely serves as the initial lure. The presence of a large number of external PDF links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=baseband+6630+ericsson+pdf
    • http://rurab.erikahope.com/uploads/1/3/0/7/130775734/vijomapuzo-warad.pdf
    • http://files.ezs.nl/uploads/1/3/1/3/131380337/xajejavetifexo.pdf
    • http://files.goodpointmedicine.com/uploads/1/3/2/3/132302970/18b2aee182.pdf
    • http://pemebako.unterwolfen.com/uploads/1/3/1/4/131407089/638694de39c.pdf
    • http://files.clancyassociates.com/uploads/1/3/0/8/130813768/1655723.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/zotominelerota.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/83486518125.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/fowunegej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2100/files/7532829033.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/leruwuxoropibobodusatif.pdf
    • https://cdn.shopify.com/s/files/1/0439/1193/8216/files/gosilapewanaxifuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/retirement_party_flyer.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/67163921521.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/41717806829.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/mesorudorajopukitutemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/fazifofurorod.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b0e.bin
17133caac6fddc44f8415e30de47b511b7011a725e5315b265bf90ba1f59c853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0E 3160 bytes
font_01_sfnt_off0000665a.bin
3b33a154e3dc766227a2739b46b1c33d387d37fe9a14b44c852259abf5bf5a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665A 5476 bytes
font_02_sfnt_off000078da.bin
37482b9941b1429f2ed46ffe5a505ef235dc9f92d40db0adf92cf6b6144e236e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 15260 bytes
font_03_sfnt_off0000a7c0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C0 4324 bytes

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