Malicious PDF — malware analysis report

Static analysis result for SHA-256 599c5604d81e8df1…

MALICIOUS

PDF

35.8 KB Created: 2020-09-18 08:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08c13cebcf4eed4a209fc762b620b207 SHA-1: 75204014d637f4d6a0dee6c7c1c71e4ab889bbf3 SHA-256: 599c5604d81e8df1d19d43c6b66beab93dd99dd045f86e77ca99a3b5927a9308
152 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, specifically pointing to 'https://ttraff.me/wix?keyword=essentials+of+comparative+politics+with+cases+%2528sixth+ap%25C2%25AE+edition%2529+pdf'. This URL is presented within the document body, disguised as a book title, to entice users into clicking it. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt, further indicating malicious intent.

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.me/wix?keyword=essentials+of+comparative+politics+with+cases+%2528sixth+ap%25C2%25AE+edition%2529+pdf
    • https://17e2d9f0-be99-45d2-92ff-33ad46f79e78.filesusr.com/ugd/de65f7_a516ba497dff4c5ba09bc4a41da68b58.pdf?index=true
    • https://7f6567f2-25a4-455d-8c57-2eb329b4730b.filesusr.com/ugd/120f26_6ef1e76e97984854a232db85b440de78.pdf?index=true
    • https://6f0cbbda-496d-4fd0-a59b-66e0c0b08299.filesusr.com/ugd/a6e5e9_5e35ef508d5c42be8c24cdce4533f1f5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/singh_is_king_film_song_ming.pdf
    • https://5a363b55-3189-4fec-b119-f883ea424849.filesusr.com/ugd/a98ecc_a7238571e9cc472fb094780d535529ce.pdf?index=true
    • https://80b88541-3f4e-43c7-a81d-1cdb3adef51b.filesusr.com/ugd/c33cdb_92404df1483d4feda831ef52f4741ae8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/international_arbitration_law_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/kuzolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3001/2316/files/generational_differences_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0445/3344/8868/files/pros_and_cons_of_social_media_essay.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_off000047e5.bin
fb612037ea48a576eda574794ba8a697cbba5c13daaab929bc0ae57f025396ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x47E5 5972 bytes
font_01_sfnt_off00005c45.bin
09bb21f935fe3eb4f417d8a9d0f77c15d45972f26154704f36caece88cf15df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 10260 bytes