Malicious PDF — malware analysis report

Static analysis result for SHA-256 611d895322282a97…

MALICIOUS

PDF

33.4 KB Created: 2020-09-01 02:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a99cf7a7b7fa68bcefa92eeaa3fae7 SHA-1: 71851e8ee1874eb4c8b49e5d638d2ac4cfeab5eb SHA-256: 611d895322282a972ca37ccccc75d836c959db6d14eb0cdf9fbcbea7c32f4cd7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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=guided+sleep+meditation+hot+air+balloon
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_63922fa31b41428287cf2be7e624960d.pdf
    • https://static.usrfiles.com/ugd/f515ca_a275f4a6183d4bd78f2a459fec2d168d.pdf
    • https://static.usrfiles.com/ugd/5b5da7_ec8a9f2e012543feb79f92352c433c1c.pdf
    • https://static.usrfiles.com/ugd/9b5f63_cfea5fb08a1d4468bce4e9a64267df91.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/zonep.pdf
    • https://cdn.shopify.com/s/files/1/0433/6517/1354/files/sozisidazudote.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/92032260023.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/15804102785.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/kaselub.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/dpe_guidelines_on_wage_revision.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/english_speaking_vocabulary.pdf
    • https://static.usrfiles.com/ugd/6df952_1340e63cb00c43bdb8906dce21f0306d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b6e61671bf14258ab38b24dae5e0cb3.pdf
    • https://static.usrfiles.com/ugd/affb4a_8c0fd7899fb147a2b681c1a5936c3188.pdf
    • https://static.usrfiles.com/ugd/b8c837_88d61fd07bf1437c88f4d5ed8bd4f251.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_off00004644.bin
9e8d553beabd677f898fbb13864fa16aa4eff5177c1d9a2201034681187700bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4644 5368 bytes
font_01_sfnt_off0000584d.bin
3ed99399005d83b2bb9aafbad70acd45fd1e1be351e11654f342e803e618e223
pdf-font-stream PDF embedded font (sfnt) at offset 0x584D 9624 bytes