Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d94b67296cb99d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 18:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 997c2f5705bebf94a32a8f1c82a3be68 SHA-1: e01c29a2c2f9e5a00e7ccebedf3d6cc46a8b2950 SHA-256: 94d94b67296cb99d113edc818610676a1580aaf334d3faf8d2f2e85848422ce1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains keywords related to financial guidelines, indicating a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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/pify?keyword=fannie+mae+guidelines+for+cash+out+refinance
    • http://wepusegi.sp-arms.com/uploads/1/3/1/4/131453718/jefojowatinizi_vojifizas_zizawofelilebad.pdf
    • http://files.cemscompany.com/uploads/1/3/1/8/131857115/7c5852.pdf
    • http://files.couplesexperience.net/uploads/1/3/0/8/130814715/womebuvelaji-bumasubafiter.pdf
    • http://files.jmholden.com/uploads/1/3/2/7/132711999/4085731.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/vuravaxog.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/kedikidivudogasimorenob.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/89710970303.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/77817061428.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/nonlinear_dynamics_and_chaos_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/how_to_write_appraisal_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/acls_provider_manual_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/lofewivebozusegufazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7057/files/88150969003.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3406/files/hollywood_action_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/86664969591.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/mifirunepoluto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.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_off0000668b.bin
f69943a6a9a8f4333c8c9e865880c4bfebeee3070ee5d0d06ede5ac10c483312
pdf-font-stream PDF embedded font (sfnt) at offset 0x668B 5392 bytes
font_01_sfnt_off000078af.bin
922bb423dbf32c9ed8ebe4e16d4d0324ee883a8eddc1a0f91ab9cddcc2ac8a4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10400 bytes