Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebc64f37a428652…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 20:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e83575db9a7ce97b449e8231db84097f SHA-1: 1ea86e2a92c6f18ee5c1801bb85bdca71d57df2e SHA-256: 6ebc64f37a4286521900b2b9892846e9a2e162eb04257a9d6a67abb973de63f1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=ferramenta+epic+six, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful destinations.

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/wix?keyword=ferramenta+epic+six
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b13fd1_27c61db368f940348189ec51e6927cfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1befd1435fb456193bef9b441353e4c.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_5464d71d045441d2adc856c6b6782afc.pdf
    • https://static.usrfiles.com/ugd/9b33c5_9738e4f703974da3a339e102b8d1c09b.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8172/files/animal_rights_articles.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/architectural_styles_owen_hopkins.pdf
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/fremennik_hard_diary.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/wanugevoduvafipurobebuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3569/files/5_kingdoms_biology.pdf
    • https://cdn.shopify.com/s/files/1/0463/3634/4226/files/miller_heiman_blue_sheet_xls.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2904/files/caldeiro_azul_marcelo_gleiser.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/Dupont_tyvek_change.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/ropujumagaxerip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/poxotufobelufemitunetuka.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_off00006468.bin
e4be10672d59ae1ce6b5b99fdb9f3abe44f98c4d9a5921ea27c8007ad370f10f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 5068 bytes
font_01_sfnt_off0000758b.bin
f06886dbe97054411beb065b558ba705e22818e0f2c8c4771a2aae166b6f5f65
pdf-font-stream PDF embedded font (sfnt) at offset 0x758B 10588 bytes