Malicious PDF — malware analysis report

Static analysis result for SHA-256 c330a2c36a43f863…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 16:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f86fb9e8b93d6c4140a6927124e3bec8 SHA-1: ee7a6b2dc3bf92983debf47096db8dd162d07ac9 SHA-256: c330a2c36a43f8630bdcb948c1be8d15adc95c045e26b50eadfc8ccb022c361e
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, likely designed to obscure malicious destinations or to perform SEO poisoning. The primary malicious URL identified is https://ttraff.com/pify?keyword=canavalia+ensiformis+usos. No scripts were extracted from this sample.

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.com/pify?keyword=canavalia+ensiformis+usos
    • https://cdn.shopify.com/s/files/1/0437/7034/7677/files/closing_stock_valuation_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/5752/6437/files/82487186892.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/37832385339.pdf
    • https://static.usrfiles.com/ugd/3aca14_bf0a98939fbf4e259e9db64d225fe62d.pdf
    • https://static.usrfiles.com/ugd/409ca8_c43f93a5ecb943379be9ee546c5c8330.pdf
    • https://static.usrfiles.com/ugd/e5412a_e533a3ad7e8d41868f51dd252969d449.pdf
    • https://static.usrfiles.com/ugd/09c3c7_1b1121656d9148ae8943d87c1295c43f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/zefazajojozefekonekifoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/network_cabling_tools.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/69043721347.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_off000076a9.bin
7f4caef6332fe8ebf7c1baf0c2aaa62cd88fbd164fb8482190e4f8349c2e7653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 4880 bytes
font_01_sfnt_off0000872b.bin
e357d3eac9b08ba1ceed615b07e3c04b830009561405ca6757d94798a4c88831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872B 11040 bytes

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