Malicious PDF — malware analysis report

Static analysis result for SHA-256 115f5a8b49ba832c…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 06:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649a2e8b5237f8b9b409b1a5ea6504c7 SHA-1: 8ddb0f42b8f194ad4a6b042a3aa6da39c714331f SHA-256: 115f5a8b49ba832c183f31a959ded69c2d2fc70e1272efb5ab6b82b51111ca17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for an 'interior design course book pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploitation. No scripts were extracted, but the presence of embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users.

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=interior+design+course+book+pdf
    • http://files.greenbuffaloestates.com/uploads/1/3/0/9/130969327/tomefat.pdf
    • http://files.dunhamsseptic.com/uploads/1/3/2/6/132683292/253f7715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/duzetejujifexemaxigawux.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/92874045891.pdf
    • https://cdn.shopify.com/s/files/1/0445/4960/3487/files/23306206873.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/cissp_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/acls_guidelines_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/jurofokedolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/canoscan_lide_110_scan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/academic_listening_practice_test_10_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/38941309629.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/danigufani.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/new_immunization_schedule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000636b.bin
5e7bbfc33eb4ccd35febd62397933737a19f0054523cc54ba86920c9a317fd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 13008 bytes
font_01_sfnt_off00008d59.bin
dd01c15870b40dd41d00624cf80cd0013937d51036bfedcc070057cd7402d0c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 5220 bytes
font_02_sfnt_off00009f2e.bin
52a4fdf0f6e2423905d749a836f81fe964b2cf6603475f86c39dffe83633587f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 10352 bytes

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