Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c422ec636e2088…

MALICIOUS

PDF

37.1 KB Created: 2020-08-17 14:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a732acfa4a72524460bc462728655f SHA-1: 913b07ed84233c7ea60036050fd547a72a5dfc41 SHA-256: 77c422ec636e20886ff3c86cccaaf6fe2ab61911395a51ac4c9832d3425ebcba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a movie title and the malicious URL, suggesting a lure for users to click the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of redirecting users to potentially harmful content.

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=aavesham+telugu+movie+free
    • http://files.broadwaterdragons.com/uploads/1/3/1/4/131453253/2503781.pdf
    • http://files.highdene.com/uploads/1/3/1/4/131453818/lusezuvexudebo_ronalaz.pdf
    • http://files.primalrejuvenation.com/uploads/1/3/1/3/131381044/laderixo_xadozevirubul_donawefokif_fedajefuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2218/7685/files/97587576376.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/astrologian_guide_ffxiv_4._2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/bandeya_song_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/karopoximiduloniwusefis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/biodiversity_conservation_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/fatinagezativajoxab.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/lawaxuxenojolen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/63071494191.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/belurogerin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.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_off000055c9.bin
18ba4e93d1509c9cde47ea2db6803bcfdd7601cb4d8b6c19efca93ffa7240b8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C9 5228 bytes
font_01_sfnt_off00006776.bin
0c635eb75d8cb4fae5a8ddf8c314b7659bd5c88917127b34b4b6480e5c97b2e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 9536 bytes