Malicious PDF — malware analysis report

Static analysis result for SHA-256 547398dcc73edf53…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 17:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ccbcd82001340757bcdbf34de6c9508 SHA-1: 688590c9e79e02ea66cde8df50dc08a5f75cbac9 SHA-256: 547398dcc73edf539a3af4fe82cddeeb6c0e1235700c81e8a6356a3a20406bff
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains text related to 'Tesda bookkeeping' and 'reviewer pdf', suggesting a lure. The presence of a malicious redirector link indicates the document is designed to lead the user to a harmful destination, likely for further exploitation or phishing.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=tesda+bookkeeping+nc+iii+exam+reviewer+pdf
    • http://files.whycantlance.com/uploads/1/3/1/4/131438234/e3e29d1674a7e3.pdf
    • http://files.writingaboutliterature.com/uploads/1/3/0/7/130776033/visurin.pdf
    • http://files.ilariamarsilirometours.com/uploads/1/3/2/6/132696155/fowisasowakavobivim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/pozewusexew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/potamevanikogibogemukos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/index_of_vampire_diaries.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/70338436261.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/49204345865.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/ncert_biology_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/sibukivalufoxakim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/81701859053.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/pusufujopelunowiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/56557455368.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/femebijujarijexisoveremep.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/57906524329.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_off00006f27.bin
c70a46c6c0fa51ce7d1ba58df5a404b8493c969b9a2e7b4bf598c5e126275bd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F27 5816 bytes
font_01_sfnt_off000082f9.bin
a2fc387e1bdf1afe7157bf2d50c032c17f3214f3c2a1d690b8786a611bd76097
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F9 10360 bytes