Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d1c7d411c3d663…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 19:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80e3d242609d490b53071c6de45f29e9 SHA-1: 87d326dd20f5e4d2e8b596146e71e1923c09a0f6 SHA-256: b2d1c7d411c3d66359b0a3b996d1fbdf0ceb3165190a69bb883454e685f49606
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical link pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=autocuidado+psicologia+pdf`. This suggests the document is designed to lure users to malicious infrastructure. The document body itself is heavily obfuscated but contains references to the redirector URL and other PDF links, reinforcing the link farm 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=autocuidado+psicologia+pdf
    • http://files.ojmfarmcontractors.co.uk/uploads/1/3/0/7/130776698/d37caf3.pdf
    • http://files.willettonfootballclub.com/uploads/1/3/2/7/132740925/00b88ca02c4f2.pdf
    • http://sefig.universalshowqueenpageant.com/uploads/1/3/1/6/131606069/nuwisijekivaxawenuk.pdf
    • http://pebom.freerepublicdefense.com/uploads/1/3/2/6/132696111/kudizavuweg_kowimogo_xikumeguju_tisamur.pdf
    • http://vawakegil.xtorch.org/uploads/1/3/1/1/131164250/fezimoju-dugisenapavusas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/christopher_hitchens_mortality_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/3212296628.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/69510502964.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/gibumujefasomaxuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/48308995826.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/29624096947.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/7019081230.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/81792980332.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/10242730031.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/act_overlay_plugin_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/divutuwexiluvi.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_off00006742.bin
c4daa3d3d8e68b3cc619616c38b29c76065fd64448c53537a81a9e44cc089e18
pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5216 bytes
font_01_sfnt_off00007913.bin
096da66314a52a452943aa9b99414a066ee92f5bcb5daef1080e08f27ce135d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 11264 bytes