Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd4e0a499e07cfd…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 18:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acc3bf419d109869a3b1d96f225a1f59 SHA-1: dab9fcf7e77dadc2d4507c9a3638780c9a3455ec SHA-256: 4fd4e0a499e07cfd6385d9ceb867cd9a8f18cf71e4cf6a951bc10ec7500dd1dc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=suzuki+owners+manual+pdf'. This URL is presented within the document body, disguised as a Suzuki owners manual PDF. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm for SEO manipulation or to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness.

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=suzuki+owners+manual+pdf
    • http://gixadi.alexusbomar.com/uploads/1/3/1/3/131398140/29dc50e93e.pdf
    • http://wajozumer.marengotzmann.net/uploads/1/3/1/8/131871390/nuniwufamonikarase.pdf
    • http://files.birdhouserow.com/uploads/1/3/1/1/131164202/c1a8824592b5363.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/alopecia_androgentica_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/dynamic_equilibrium_economics.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/john_carmack_ferrari.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/bls_provider_manual_2015_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/gedijer.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/gedotejufinep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/aston_martin_v8_vantage_workshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/birovuwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/risk_management_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0435/4827/8935/files/arsenic_in_food.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/folutinajajitutedulibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.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_off00006614.bin
4bd2379dbbea4a72a2320052c863067c47f64d22d8762259149ad36c903ac828
pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 5496 bytes
font_01_sfnt_off000078c2.bin
2151fc3d17d1adef9b2d15ff93ae88cdf2a6639fc92bbec698e91fd28920b2b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 13748 bytes