Malicious PDF — malware analysis report

Static analysis result for SHA-256 e554fd49a20e922f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 04:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1fbca9644491c458b8caf097f53e6a5 SHA-1: f60db99f9ea1ef38bf71fe0abd0e36a83b14c1dc SHA-256: e554fd49a20e922f662f5df04b1fa735b44c21fefc31b8928f65c0607bdd1623
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/wix?keyword=acondicionamiento+cromatico+wikipedia, which likely serves as a gateway to further malicious content or phishing pages.

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/wix?keyword=acondicionamiento+cromatico+wikipedia
    • https://static.usrfiles.com/ugd/8cbfce_b41cca1fb1a44e6689f9c8abc79c9579.pdf
    • https://static.usrfiles.com/ugd/3e87bf_8447f59b41964e8b9b7117c67f811288.pdf
    • https://static.usrfiles.com/ugd/ce5d00_a482d62f7ae6416789020d38ee9e4ed2.pdf
    • https://static.usrfiles.com/ugd/d54300_19660e8cbfac4ce7a7e920b12685c5c3.pdf
    • https://static.usrfiles.com/ugd/5ecadc_a83f98b265744e9f9366a34322c11e3c.pdf
    • https://static.usrfiles.com/ugd/4c1554_7712b4c065f240c7bb13a939f4e2024e.pdf
    • https://static.usrfiles.com/ugd/de02f3_85060853d94a46ed85b1c7c012d17280.pdf
    • https://static.usrfiles.com/ugd/b8c837_a45926fb051d41e8aacf8757528a5a29.pdf
    • https://static.usrfiles.com/ugd/58a813_bbaff8a1c6e946fba780de4a85a7c50b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/atonement_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/39232043558.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/mujiwufopalorupuxelimanen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1836/2781/files/15827659821.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/19388962886.pdf
    • https://cdn.shopify.com/s/files/1/0428/5408/8871/files/30701661948.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_off00006611.bin
cb8e8dfa5c7808b630091e75a07bcd11f635d39078099471c8f42819a86e220f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5156 bytes
font_01_sfnt_off0000778b.bin
b9b8010d2455a1f28bd5a4748db40e7a780d24e72fc007d949b4123f07539e8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 10812 bytes