Malicious PDF — malware analysis report

Static analysis result for SHA-256 435c56f8c8cd3750…

MALICIOUS

PDF

35.7 KB Created: 2020-08-31 01:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616806022aff0c376949f2ea5e1bdbaa SHA-1: 438d8366c6ea633c3b89d407aa8136cb1cd35ba0 SHA-256: 435c56f8c8cd37506701f6c588f003c8ecdd95a226a87a8ae4a6ad4697df29b2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=dr.+a%2527+s+habits+of+health'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to other PDFs hosted on static.usrfiles.com and cdn.shopify.com, likely to manipulate search engine results and lure unsuspecting users. No scripts were extracted from this sample.

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.cc/wix?keyword=dr.+a%2527+s+habits+of+health
    • https://static.usrfiles.com/ugd/b8c837_b9cb98e7aaa244ebb303e8d3e69481bb.pdf
    • https://static.usrfiles.com/ugd/225520_67f466a465534e5aab338c6cce09213f.pdf
    • https://static.usrfiles.com/ugd/accd1f_23f341ed334c4638adf36c199ff6b0c2.pdf
    • https://static.usrfiles.com/ugd/af0aa9_c1e1eb29b3a04bd88b2ffcd9dff240b5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/talismania_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/bhagavad_gita_in_tamil_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/24367164382.pdf
    • https://cdn.shopify.com/s/files/1/0434/4243/8310/files/franchising_as_a_growth_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/9537/5524/files/simple_english_words_with_meaning_and_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/2345009761.pdf
    • https://cdn.shopify.com/s/files/1/0462/0097/9606/files/printable_vehicle_bill_of_sale_va.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/11625138196.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/rekogomifewikoku.pdf
    • https://static.usrfiles.com/ugd/33ab24_08bfa54edf84413894cc4e14dd7220ed.pdf
    • https://static.usrfiles.com/ugd/238140_b8c5d2e1a5aa460b88900077d88076ec.pdf
    • https://static.usrfiles.com/ugd/c5d40f_f0d9adbc907b4861a7a1a403041634e9.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_off00004ef6.bin
e52be7daf8367cf24aec356375f3ec92004de89e8db5c60152bc24767cac3ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF6 5060 bytes
font_01_sfnt_off00006031.bin
77853c4e068564da18e15dd503492074b4fd80611bee9fef66bac572d98c5a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 9952 bytes

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