Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87819f13f8c301e…

MALICIOUS

PDF

57.1 KB Created: 2020-08-14 00:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 583974549a8519ab90ac9497bbf2469c SHA-1: bc2a76a3ed82d4d0a6fec5ec7f2cfe2a4e980594 SHA-256: e87819f13f8c301e26d26f4e97bb0f942e9bdd7b9f9cd3e38770ce40d50fe8db
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript and links to known malicious redirector infrastructure. The primary malicious link, 'https://ttraff.ru/pify?keyword=catalogo+cores+suvinil+pdf', is presented as a catalog, likely to trick the user into clicking it. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm techniques used to distribute malicious content. The embedded JavaScript may be used to further obfuscate the malicious redirection or exploit vulnerabilities.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=catalogo+cores+suvinil+pdf
    • http://files.northernbugwear.ca/uploads/1/3/1/4/131407165/modofuda-tevuravikat-xejaduve-xewuzedalupus.pdf
    • http://fedegovik.fluxplay.co.uk/uploads/1/3/1/6/131606490/watufujinewojabul.pdf
    • http://xixotaso.avalonbeachpodiatry.com.au/uploads/1/3/1/3/131383726/xefiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2876/files/35105278013.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/behringer_xenyx_802_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4935/files/black_sabbath_war_pigs_tab.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/legudiwijipelisuwapo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/5680936048.pdf
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/esv_bible_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/napupemuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6028/8927/files/65200806372.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/64702528375.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/vogetexefonewesazaruj.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_off0000a12f.bin
db8ab84b649c805b5dd74c709414426a55e7adf4a7e2388843fd1181e2fafb63
pdf-font-stream PDF embedded font (sfnt) at offset 0xA12F 5288 bytes
font_01_sfnt_off0000b344.bin
19cd9384312f00c35c20bf7e89e3c26f663929b2ee4e665b868f602df437e342
pdf-font-stream PDF embedded font (sfnt) at offset 0xB344 10580 bytes