Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd435800151a24c5…

MALICIOUS

PDF

52.8 KB Created: 2020-08-20 23:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a7e2a65637ef91438834ef4280c9439 SHA-1: 4fe0330d705d4d5a0524c6cc9786af520e03ec7d SHA-256: dd435800151a24c59425dbcf1a26ce6f4cccba4ed01a52b0d996094c69847c0d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link identified is 'https://ttraff.com/pify?keyword=false+coral+snake+care+sheet', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting a social engineering lure disguised as a care sheet to drive traffic to malicious infrastructure.

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=false+coral+snake+care+sheet
    • http://files.kauaicleaningdoneright.com/uploads/1/3/1/4/131454521/5213611.pdf
    • http://somabodaw.amalgamatedstory.com/uploads/1/3/2/7/132740892/rasifewa_babipug.pdf
    • http://files.noelironart.net/uploads/1/3/1/0/131071067/2416974.pdf
    • http://files.staceydrago.com/uploads/1/3/1/8/131871951/190565.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/self_recommendation_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0449/8338/6280/files/c_thread_safe_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/jawadirofaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/81838768837.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/94091635475.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/etymological_dictionary_of_the_armenian_inherited_lexicon.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/pdf_to_word_converter_software_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/96204335327.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/33826050593.pdf
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/payment_request_form_gmu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/24615384207.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_off00009147.bin
cc35fcacbc762824dcf158a1b383bd366faba333eb4af2cd8b7fe1986930a18f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9147 4904 bytes
font_01_sfnt_off0000a1e5.bin
ca59c7ed5f5733719fcd686d28d4879fb2335eaaed584c8cba7ea01156fe8690		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E5 10636 bytes

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