Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef58c8b6b4f04fa…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 15:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd59acbfc6d8d254617e2f48a837f60 SHA-1: 520d474ca65723c5d11cb666fcf73df94c006890 SHA-256: 6ef58c8b6b4f04fa6eb63598408700ba16da675002cf719fe6b547ff90fe3e89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'livros' (books) and URLs, suggesting a link farm or SEO poisoning tactic. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site.

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=livros+de+celso+vasconcellos+para+baixar
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/apk_facebook_lite_for_nokia_e63.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/xavotov.pdf
    • https://cdn.shopify.com/s/files/1/0468/8681/3853/files/vovakagexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/gubiverazemamow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/mivutekakodam.pdf
    • https://static.usrfiles.com/ugd/ac72e0_bbc29ed4f76346719df49c582744e649.pdf
    • https://static.usrfiles.com/ugd/b8c837_7766d10a3d1948df888cf8c94ca6f3d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_6797cc100474482bbaf7bc7ea767e960.pdf
    • https://static.usrfiles.com/ugd/b8c837_132628c7ef364e36a9117a681bf6acdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/15508605463.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/bovoviwezesej.pdf
    • https://cdn.shopify.com/s/files/1/0451/3382/4154/files/75646806952.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/bloqueo_auriculoventricular_electrocardiograma.pdf
    • https://cdn.shopify.com/s/files/1/0452/5198/5565/files/icons_for_email_signature_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/54416084056.pdf
    • https://cdn.shopify.com/s/files/1/0448/9897/5899/files/free_download_al_quran_dan_terjemahan_bahasa_melayu.pdf
    • https://cdn.shopify.com/s/files/1/0453/9387/1016/files/88576039554.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_off00005ef3.bin
833c22b75f9ff8bded342528e1096e4b80dd081ee4488e4ba509af917d7946a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 5276 bytes
font_01_sfnt_off000070f5.bin
d3d7579d8d6ca08c0727f8ba2e02fdce7ccfe437b0ebb5a1eb1705cf135e7751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 12996 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.