Malicious PDF — malware analysis report

Static analysis result for SHA-256 84022edc8557e338…

MALICIOUS

PDF

39.1 KB Created: 2020-09-01 08:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff383b34fea8471bd82b794a81973e0e SHA-1: 5d634d5350e2ad733d7f628b0ca07eb2d3321768 SHA-256: 84022edc8557e33896ed3c8922aba5731a7bc6d159b678ef3720f4e08f061d21
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=auditoria+informatica+de+explotacion+pdf, which is flagged as a malicious redirector. The document body and embedded links suggest an attempt to lure users to external, potentially malicious, content under the guise of providing PDF resources.

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/pify?keyword=auditoria+informatica+de+explotacion+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/wunurusikufibagokiwaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/flowers_images_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/78668132253.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/lamofubuxeran.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/learn_english_for_spanish_speakers.pdf
    • https://static.usrfiles.com/ugd/1813b3_b9f6d255a9c3414fb7baf641af78687d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6709bc75bdb48f1aad4cab8ec6c77ee.pdf
    • https://static.usrfiles.com/ugd/12dc78_2d3947549a1d457daa93a0ca57f53808.pdf
    • https://static.usrfiles.com/ugd/b80405_ef9253b8da544b44bf4a893038d961da.pdf
    • https://static.usrfiles.com/ugd/a18aa6_036fd6cf3f0347369368e048ab377d75.pdf
    • https://static.usrfiles.com/ugd/b47706_fb3cc158016c44f1bc919c59f5171b03.pdf
    • https://static.usrfiles.com/ugd/ef7b09_01ac8f1c40f141aa90a6986315d999e6.pdf
    • https://static.usrfiles.com/ugd/e78b77_dd50289181be49ff957b9b56172a2e0c.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_off000059a1.bin
76744f38dfd0b7ac3c87a866dfe45427bd801751b60342d5fffe3fef34e94e9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A1 5180 bytes
font_01_sfnt_off00006b31.bin
eb3ef76875b53f3481268d29e99777ac161a3d85d322b16ef7e54e96f962798f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B31 10840 bytes