Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5edec936f27078…

MALICIOUS

PDF

52.6 KB Created: 2020-08-29 14:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22c96965b26baa3c5530a95ba6236b3 SHA-1: 78f32abc0bf08727d3994aa002640113454b6e9e SHA-256: ee5edec936f2707843532ef1ba02c226820fedb6a9fb30204ce93fe31c4dc595
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external links, characteristic of a link farm. The embedded URL `https://ttraff.ru/wix?keyword=adempiere+vs+odoo` is the primary indicator of malicious intent, likely serving as a lure or a redirector to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=adempiere+vs+odoo
    • https://static.usrfiles.com/ugd/9e41f0_f48db3113fed483dbebe5ea179f1bc24.pdf
    • https://static.usrfiles.com/ugd/b8c837_77221a66c268461892ee2ec5bfdc527b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea840c07449841309ba662df1533cf19.pdf
    • https://static.usrfiles.com/ugd/33c377_c4bbb392bb414b158a3939df9adc28a6.pdf
    • https://static.usrfiles.com/ugd/30e015_dd014d1ff0884123b56ba1e888b515bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4428a6865b444c5a8e2229b284c24979.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/magazine_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/introductory_statistics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/87851131744.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/1593364405.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.pdf
    • https://static.usrfiles.com/ugd/b8c837_702f54417be04f348fcd7bf88b2809b7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007001.bin
c4fe44051865f5993fe93f90c3c95aa5ae067719a3ced22c21f9667d3ba34766
pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 4912 bytes
font_01_sfnt_off000080a8.bin
40f471165a3fa36e64a83eacd0eafdd2c9d617eb9db8c3a4d20a5e629f09613f
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A8 14792 bytes
font_02_sfnt_off0000aed4.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0xAED4 16092 bytes