Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e4f8b134c059ac…

MALICIOUS

PDF

36.8 KB Created: 2020-08-13 06:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fda3429114b421750b5b5fe5bb5b9252 SHA-1: 6815e12440e32c85ed32d89ed183a437faf646f7 SHA-256: 86e4f8b134c059acbc5f223b17322ed4d0de28e5b23c0a77cb54367f5fc45232
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to potentially harmful sites through a link farm, disguised as a document.

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.ru/pify?keyword=biography+graphic+organizer+pdf
    • http://files.vivekshah.net/uploads/1/3/1/6/131637239/laropanonele-sapidefiwaji-gijufo-davabosilab.pdf
    • http://files.preraktrust.org/uploads/1/3/1/4/131437689/dodiwanamigopeju.pdf
    • http://files.klarahomes.co.uk/uploads/1/3/1/6/131637108/6506262.pdf
    • http://dalusuw.vetrovero.com/uploads/1/3/2/8/132814935/xonomiwozidovewujik.pdf
    • http://files.becauseitallmatters.com/uploads/1/3/0/7/130776110/kumilum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/bible_commentary_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/pokemon_sprites_gif.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/lodipewakake.pdf
    • https://cdn.shopify.com/s/files/1/0431/1878/8774/files/role_of_biotechnology_in_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/dates_in_english_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/diwozedexagogekak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/batman_arkham_asylum_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/kiroxexumupeze.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/nios_assignment_front_page_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/16279216555.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/82420853180.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/88311629962.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051b7.bin
b3a5e63f53afee90bd55bb2b51ea7ff6835f7493a0c8d579d0d0574671563439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51B7 5408 bytes
font_01_sfnt_off00006422.bin
dbefc6b218b7c4e980fa341098e961e98a64b17d9782e0dece1ee427a3afdeef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 10040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.