Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c518268792c3166…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 01:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f40b5234effd444aefe763293ee257a SHA-1: 83bce20cf01c86c4facde86a70f7afd2cbb5b928 SHA-256: 2c518268792c3166e526fd13e1c7f11080e1efd4b1bf50e0a3faa144c544aea1
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised as a 'home rental lease agreement pdf'. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering, luring the user to click on the malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=home+rental+lease+agreement+pdf
    • http://detafogog.karamchetty.net/uploads/1/3/1/4/131437615/2807452.pdf
    • http://files.catherinebutlerart.com/uploads/1/3/1/3/131380001/salede_pozopovovodapat_vozijuw.pdf
    • http://files.americanabytheseashore.com/uploads/1/3/0/8/130814227/gufises.pdf
    • http://wanujipor.snugnut.com/uploads/1/3/0/8/130814328/1042799.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/9083942369.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/91446523177.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/sony_strde_197.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/rininosopabupovoduwem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/89276019802.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/bibilubikavenib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5615/1190/files/john_deere_310_backhoe_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0436/2321/9363/files/famufebukanebewivedadux.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/leviw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6811/files/two_dimensional_array_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/agility_ladder_workout.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_off000074a2.bin
594e3e5a70c7bd23aa9e20d294e4870a6f5c46a77f37b4a5823c36e9846c951a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 5320 bytes
font_01_sfnt_off0000869f.bin
90fbeb37918ced02f5b193398f37250630961451bee0e91ab831410c3d7a471f
pdf-font-stream PDF embedded font (sfnt) at offset 0x869F 9852 bytes