Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce794d7ddf929710…

MALICIOUS

PDF

33.2 KB Created: 2020-09-01 04:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d65c600fd14c71bdfd0be2d6677e8f04 SHA-1: e48cdbb465b5591fd1453d87a4d450b4bd66d829 SHA-256: ce794d7ddf929710c18f147814717ab6df87013c3c872e57d2a83a2d2122fafc
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though obfuscated, contains text that appears to be a lure, such as 'Brio tuscan grille menu pdf'. The ML classifier strongly indicated maliciousness. The primary attack vector is likely directing the user to the malicious URL for further exploitation.

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.cc/wix?keyword=brio+tuscan+grille+menu+pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/foriwumuvusesomibibidulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/nogoruxixovedelefoka.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/tunifofotowixoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/vakagigepupajafolevi.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/riesgos_psicosociales_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/pipapinoxivuvug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/35753405251.pdf
    • https://static.usrfiles.com/ugd/f0e51d_dc8d88831c494a238c34e8103f14073d.pdf
    • https://static.usrfiles.com/ugd/739437_eaa69270748745f5822229fa0aa2c9bd.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_cdefc0955169477a8b438f7824fee293.pdf
    • https://static.usrfiles.com/ugd/87a178_1c2d4da8552d47678a286c15a672f1f0.pdf
    • https://static.usrfiles.com/ugd/e6092c_b4200b143c654f6e98da6fb0cd948171.pdf
    • https://cdn.shopify.com/s/files/1/0457/8983/9516/files/94814120286.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/vuzawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/subject_and_object_relative_clauses_exercises.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_off000043be.bin
cb13a47d37702cd22f14c39293636727a2dfc65e6be466d981f0c54bb0edb116
pdf-font-stream PDF embedded font (sfnt) at offset 0x43BE 5524 bytes
font_01_sfnt_off00005677.bin
6f75eaf24888ba91f2fe90cce142527e400bb7470d822cfef49eb45cef4e6b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x5677 9796 bytes