Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef761dacaf6a5018…

MALICIOUS

PDF

47.1 KB Created: 2020-08-19 21:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85620cac23ca78f34f142f2aa5de6e20 SHA-1: 574c73a320162815fba7b74e3e9b31c3ce7a0501 SHA-256: ef761dacaf6a50187dc2825810f2631a6557753aae6b98092ceb806cdfc35b6a
120 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 of which point to a redirector service. One such link, 'https://ttraff.ru/pify?keyword=lugol%2527+s+iodine+data+sheet', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites under the guise of providing a data sheet.

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=lugol%2527+s+iodine+data+sheet
    • http://files.pebbleaustralia.com/uploads/1/3/2/7/132710787/7576252.pdf
    • http://vedopu.bernardfraga.com/uploads/1/3/2/6/132681579/kuvusulibitisiw_salurerowox_kupubasevi_noditi.pdf
    • http://files.louiseneaveportfolio.com/uploads/1/3/1/3/131381542/9159848.pdf
    • http://jawizifuf.thepts.net/uploads/1/3/1/4/131452977/jevowobo.pdf
    • http://pijin.brijcommunity.org/uploads/1/3/2/3/132303354/mixawav_lunikufazujakoz_nobikok_segipegaxesol.pdf
    • https://cdn.shopify.com/s/files/1/0449/3508/6248/files/mazebo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/somewhere_safe_with_somebody_good.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/nakuwuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/mathematics_textbook_for_university.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/tokisofufedojisizim.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/niwofofejikekufilotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/litavekewujafotalive.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/6054767103.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/76673156224.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/4578528077.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/ribakoxedas.pdf
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/gakalekan.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/sewoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2289/9608/files/98659397520.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_off00007ba9.bin
d3c9f7606eee379bc00ca1e4e0b3d585d1c5bc74378912ef9c752f3755033883
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA9 4964 bytes
font_01_sfnt_off00008c91.bin
cce9f823bdc9fafaddf33eefb148dd12d57d35c8509e3f6c2b1ee19fc847aa53
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C91 10240 bytes