Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac3ff539b12e981…

MALICIOUS

PDF

38.2 KB Created: 2020-08-17 02:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8628eb63eba5fb177b612526faa6282b SHA-1: 7ef174bc181ad9d8a214524b4f84c2702ab5be5c SHA-256: 6ac3ff539b12e981291af6f7e919cd5b0ef0433aab0dea52e001657a5c0da485
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '2018 daily calendar template excel' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports a phishing or content-luring attack pattern.

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.com/pify?keyword=2018+daily+calendar+template+excel
    • http://jalag.vincebierworth.com/uploads/1/3/0/8/130814328/26f2c.pdf
    • http://tixudafev.naturopathicphysician.com.au/uploads/1/3/1/0/131070872/xijemaguzefa-litibobavavug-waneferusi-sajajuxeb.pdf
    • http://files.carinawingel.com/uploads/1/3/0/7/130738870/vefukiwa.pdf
    • http://files.artbyrati.com/uploads/1/3/1/4/131453056/mupegiputulano_rofur_wazor_befinede.pdf
    • http://novagas.angelsofawareness.com/uploads/1/3/1/4/131408970/sixuwikutazizisab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/63061593.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3690/files/gewixetitor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/miwisire.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3529/files/10281692093.pdf
    • https://cdn.shopify.com/s/files/1/0438/7209/2315/files/kujozegoxomibekowefafi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/dofawabataberixigigaro.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/35502838099.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_off0000579b.bin
d20680df25505399b5fbbd4f89f5e97f0a9a11e96709ec9e9f3f7a7020427994
pdf-font-stream PDF embedded font (sfnt) at offset 0x579B 5636 bytes
font_01_sfnt_off00006aa8.bin
23cec932340f01b055e8006fe5f74c8096c3743e89713ce9e9db495b9aa201aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 9864 bytes