Malicious PDF — malware analysis report

Static analysis result for SHA-256 1815217388470597…

MALICIOUS

PDF

48.5 KB Created: 2020-08-29 18:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 883dd8df55264d0656b9ed13dfa356a6 SHA-1: 4e9bb5b568c3a809a157c1242b13b178d2c9a792 SHA-256: 181521738847059783bc7d8d7e09647f162439beafb83a57696fdca0b4ba3f6b
170 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute malware or lead to phishing sites. The document body, though heavily obfuscated, contains text related to 'malwarebytes anti-malware premium key 2017', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=malwarebytes+anti-malware+premium+key+2017
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/report_wrong_address_on_google_maps.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/necta_go_tz_psle_results.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/40k_codex_mega.pdf
    • https://static.usrfiles.com/ugd/5de1df_1f22070504864ba0a8aaf1ea7d5d264e.pdf
    • https://static.usrfiles.com/ugd/63d3ad_dd2b729c8f094d3ab3c1b9f3fb9da9d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b494aee22bf24c66a2f01cbaac0af754.pdf
    • https://static.usrfiles.com/ugd/e4a001_fd1d46b2080c42e58cd4208b8a32a579.pdf
    • https://static.usrfiles.com/ugd/b8c837_a95941689db5425b9f4a0dd5103113fd.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/supux.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/brahmani_mata_bhajan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/sitajetirevukifinetufajuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/arduino_uno_r3_pin_description.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/noes_de_aprendizado_de_mquina.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/tamesemekalekefeb.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006743.bin
d5d6b5e6e1bf795d59c6bffbebf851557b6f2423450705dee34014cb650e1550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5804 bytes
font_01_sfnt_off00007b24.bin
2bc471662d0a1ad8308e04aecd77c327522c14536673ee0fa73487c3730f6fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 10608 bytes
font_02_sfnt_off00009f77.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F77 16204 bytes

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