Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f1b0c51a04699a…

MALICIOUS

PDF

55.6 KB Created: 2020-08-23 18:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c30701e659cdc3c483d19cf33b14fa78 SHA-1: 7a4e7e73ad46808ce01385a98c4cee010abeaa93 SHA-256: f2f1b0c51a04699a45407070d8770c898d8f655820b03ebcd594daf8592d5bc2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to domains that appear to be part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's primary purpose is to drive traffic to this malicious site.

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.com/pify?keyword=graphs+of+rational+functions+worksheet+pdf
    • http://lovul.lotusranch-homes.com/uploads/1/3/1/4/131454215/savupuvesun-jorunazan-muwamanija.pdf
    • http://files.msgreenoughsvirtualguidanceoffice.ca/uploads/1/3/1/8/131857421/9358062.pdf
    • http://remedoni.hugreece.com/uploads/1/3/0/7/130738870/kaborupiz.pdf
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • http://sitex.factorfakedfan.com/uploads/1/3/0/7/130775958/wexozumut_tejodaxisaseg_vijusoterulug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/java_version_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/41960823300.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/72396159139.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/644837941.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/4547823161.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/75756512652.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/xuxub.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/donald_barthelme_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/9714456865.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/suraralupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9201/files/vobapujemonejede.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/juicios_a_priori_y_a_posteriori.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090af.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x90AF 2828 bytes
font_01_sfnt_off00009aa9.bin
61857de31f82521cef8eed934f87fa95b93c3e0c7d9ed35a5a0184580a88735e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA9 5428 bytes
font_02_sfnt_off0000ad30.bin
5b77e14c5033d5fa16f94a2dd2356dcac33d2318097d2dcfb4bdd66352c2d7ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD30 9764 bytes