Malicious PDF — malware analysis report

Static analysis result for SHA-256 89949826028e03d2…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 14:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f1d6fa564b94b6e2d8f1fa461c8369 SHA-1: 3c20caafb30597314e758d9f14d383a7de236e79 SHA-256: 89949826028e03d26de537965084ab2384900ce847b5e1e4cf02cf681f514cad
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'bookmark bar in chrome android' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many external PDF links further indicates a link farm or redirection strategy.

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=bookmark+bar+in+chrome+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/81d6a4_f576a94d58a44aa79e990222f54c0294.pdf
    • https://static.usrfiles.com/ugd/865d50_afe468817f304ce8ad28725967d79982.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc0cc1e0227497490770403dbc9ede9.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c0f31937d141bfbe664aea726c2791.pdf
    • https://static.usrfiles.com/ugd/b85eb0_db43992bb65b41899862cb73379deca0.pdf
    • https://static.usrfiles.com/ugd/fd7405_c1738625c960487fbf61617add8b78fd.pdf
    • https://static.usrfiles.com/ugd/384ea4_f082c2d7f4be4b76b8a2d9f628d98791.pdf
    • https://static.usrfiles.com/ugd/b8c837_7093ddc8f9744b2aac5c360e0eaceeec.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a9cc65bf265247cbb7543a5693e44937.pdf
    • https://static.usrfiles.com/ugd/de65f7_a56eac69847747e68f866a6f9507fe2e.pdf
    • https://static.usrfiles.com/ugd/6f58fb_c3f4ab2b1f9c4ad5998bc0eec8f2ceca.pdf
    • https://static.usrfiles.com/ugd/c1de29_fe26a8eca0fb41abb1687c0b4740b4dc.pdf
    • https://static.usrfiles.com/ugd/05900a_0059c55ff10844bab8c8a7972a1bbe6c.pdf
    • https://static.usrfiles.com/ugd/44b221_18078781be2749e79176b1d577400108.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_off00007237.bin
9e0a8dc148fbc7234c0c2924c7f7e6d9b0d0c3d45f38cd99d374b5afb85cdd03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 5224 bytes
font_01_sfnt_off000083ce.bin
d7bf54c3f746ab87783b2de63fca36b5b5e031a836018be00ec04f2cb2cca31d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 10256 bytes

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