Malicious PDF — malware analysis report

Static analysis result for SHA-256 c357c38bf445aa3b…

MALICIOUS

PDF

54.2 KB Created: 2020-07-27 20:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff0811cd1d2cd17d5ffafc469f529b1d SHA-1: 14821ac186f7b7eba969b3eae27e5d036e7258e7 SHA-256: c357c38bf445aa3b72a5a39480254618a3a9c2c4e60f8426a1395bdebc3de86b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. Another heuristic flags a link to a known malicious redirector. The document body is heavily obfuscated, but the presence of these links strongly suggests an attempt to manipulate search engine results or redirect users to malicious content.

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.cc/pify?keyword=endospores+are+usually+induced+to+form+when
    • http://files.littlepinkhousesproduce.com/uploads/1/3/1/1/131164046/bidid.pdf
    • http://files.thebeautybarnuk.com/uploads/1/3/2/8/132814364/340859.pdf
    • http://files.kel-a.com/uploads/1/3/1/4/131453213/ba3ea64e779.pdf
    • http://files.greatislandgardenclub.org/uploads/1/3/1/3/131381288/duwufegenasiv.pdf
    • http://files.heartofagiant.org/uploads/1/3/1/4/131482931/57e57b.pdf
    • http://files.heartofagiant.org/uploads/1/3/1/4/
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/10792968724.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/sivizifexovagedelaxonoxet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/72834703422.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/tadurokariwatekale.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/32158996385.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/dokolijamofumamilokugiraz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/14705153709.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/fusiwevegosepupadoludum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/1684072370.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/daxozunowipol.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_off000095bb.bin
0af0ac0172c4506c9ddc7269f9d2564cd752c0862d33a64dabb4343203699919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 5428 bytes
font_01_sfnt_off0000a81d.bin
efdeea326dcda7d9ecb5ef0d49ebb54ee13418d88767dc219b251d4fa0d30e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA81D 10240 bytes

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