Malicious PDF — malware analysis report

Static analysis result for SHA-256 8887cf71ec23d09d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 15:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9791ab5b19edfd3f040dea7a2bcac3d2 SHA-1: a49ebf3b5ca3334761bed1507ff93af71d3ae4f4 SHA-256: 8887cf71ec23d09d7d42fb54de85c7009b40e0a73f82684073db3528ac1d6246
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files hosted on Shopify, characteristic of a link farm. One of these links redirects to 'ttraff.cc', a known malicious redirector. This suggests the document is part of a campaign to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=supreme+commander+forged+alliance+mods+experimental+wars
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/mavawubu.pdf
    • https://cdn.shopify.com/s/files/1/0452/1210/6912/files/78365751278.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/titeguzutesisewutadikakum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/busem.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/analise_fundamentalista_de_aes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/48904218270.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/fedena_installation_guide_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/circle_theorems_gcse_questions.pdf
    • https://cdn.shopify.com/s/files/1/0451/1321/3093/files/ancel_ad410_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/medical_power_of_attorney_illinois.pdf
    • https://cdn.shopify.com/s/files/1/0433/9263/0940/files/98046854293.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/17437218635.pdf
    • https://cdn.shopify.com/s/files/1/0434/8103/9013/files/73208683239.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/refraction_of_light_waves.pdf
    • https://static.usrfiles.com/ugd/d5cf39_b6594b2759264624819de65328e1ac92.pdf
    • https://static.usrfiles.com/ugd/45fd81_b0380869b1304d6bbe52665ae7a26986.pdf
    • https://static.usrfiles.com/ugd/df4650_a0a1567dc31940bc9dfd388effb32621.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_off0000599b.bin
62914d646ecace0eb5d00f46e4434dffb1fe656fb8301c50561219da62a1f7f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x599B 5740 bytes
font_01_sfnt_off00006d26.bin
1a151bcdf5bb39381e08aad1eed19d636afd5280ac13811187baa951b33a182f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D26 10772 bytes