Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbacf73fa263b24…

MALICIOUS

PDF

44.2 KB Created: 2020-08-05 04:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49d683eef1ca3ddb90c78d12a509ae00 SHA-1: 10f53a90cc203cb2371946ab9e6b5abe30208c0d SHA-256: 4dbacf73fa263b242bf50959eb66ad27d5d0758f4d24764a22d45bf64024b353
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the embedded URLs leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of links are present, likely to manipulate search engine results or to distribute malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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=bracketing+in+phenomenology+pdf
    • http://files.hillcountrywoodshop.com/uploads/1/3/2/7/132741029/715568.pdf
    • http://renada.well-estar.com/uploads/1/3/0/8/130874284/posuwejitipo_kojapekipex_sujuk.pdf
    • http://files.campbellskidsclub.com/uploads/1/3/0/9/130969435/8762278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/54452800930.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/45924000712.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/pagifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/bexalotasitudofimixaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/web_design_project_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/wotaketobutaratiwigazuxes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/vaviwaroxopisasopodejix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/32274541296.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/35448147005.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/zozipuvaromokuwiwozawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/dadalu.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_off000060e9.bin
d534a8548695c621410711b1015edbdf846805f3b64e04acd18f29908e3b7036
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 5396 bytes
font_01_sfnt_off0000731a.bin
6e0e8965cf2724a16576fac417308a74f93d4d926de9f8b33828f4e0ca49c913
pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10328 bytes
font_02_sfnt_off000095dc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x95DC 4324 bytes