Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecba4e17f592bde1…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 00:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf262d07ba013dd77ec827bf80d015e0 SHA-1: e94e058b28eb89c1289570e81dce7f69e7672e89 SHA-256: ecba4e17f592bde1d80ee7df391aada696379bf3aad7c293e931169f201e8963
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious PDF.

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.cc/pify?keyword=treatment+of+hepatitis+c+virus+pdf
    • http://files.jennifernocktrainingandconsultancy.com/uploads/1/3/1/4/131455543/7678308b1a9f.pdf
    • http://files.peacecitysoaps.com/uploads/1/3/1/4/131453288/5724583326bb59c.pdf
    • http://lamivat.albemarleallotments.org.uk/uploads/1/3/0/8/130813612/02015ad35363515.pdf
    • http://files.hopeforhispaniola.org/uploads/1/3/0/7/130739024/956a5.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/30185316679.pdf
    • https://cdn.shopify.com/s/files/1/0440/7482/7941/files/altivar_312_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/the_complete_dlab_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1143/files/shake_hands_with_the_devil_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/vaborekazufonisotob.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/pandas_select_row_by_index.pdf
    • https://cdn.shopify.com/s/files/1/0431/5466/9729/files/juzukaxamufuletozorej.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/50207523664.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/cctv_camera_price_list_in_delhi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/mupugimeluf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/9330300273.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/vonitebewadavakon.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_off00004b6a.bin
6de2cc2006028b13b6a7fc7dbac510f249a2413baba2c059fc032d51916580c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6A 5372 bytes
font_01_sfnt_off00005d84.bin
f6425c7d47dc19c482f37f511aa78b4d63b40459dc97d0fd87dce6db483a5465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 10056 bytes

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