Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d8f7c63f66e5d8…

MALICIOUS

PDF

55.0 KB Created: 2020-08-21 10:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 609cfea8a00f66d6290a4a66f41e37fd SHA-1: 685b831ae1552550958e0ff619baf4c9bdd36430 SHA-256: 61d8f7c63f66e5d8fe9dafc775ed33146ef981d080ca63704430c87d4df81a20
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', suggesting it's part of a link farm or SEO poisoning campaign. The document body, though heavily obfuscated, contains the same movie search query and the malicious URL, indicating an attempt to trick users into clicking through. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=arundhati+tamil+movie++isaimini
    • http://files.psyclotron.com/uploads/1/3/1/4/131454090/6137748.pdf
    • http://xefuximu.icaihokokngo.com/uploads/1/3/2/7/132712615/454b52bcc4b4.pdf
    • http://bosutaj.lifestylefaceandbodycare.co.uk/uploads/1/3/1/4/131454057/xerilozevakad-magogoroten.pdf
    • http://files.pannypointcondo.com/uploads/1/3/1/4/131452733/tunazisufilirigadome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/70550443058.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/breaker_panel_labels.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/tisavutelilurirozofure.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/observed_holidays_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/bigo_live_app_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/luwovopekofuluwesoneg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/kizogabinalixusig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/1989_in_roman_numeral.pdf
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/lacrosse_certificate_templates.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/penguin_diner_2_hack.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_off000084c0.bin
b96753c97c2ba5dd69c93767b6ef67660a52f06f66471036abf7249486250e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 5116 bytes
font_01_sfnt_off000095f0.bin
3086f54d4f37f1e997eb3a24e01c2f576ca8e81c50203859e04f87aa77669590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F0 10352 bytes
font_02_sfnt_off0000b991.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB991 16164 bytes

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