Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8701b3ee868f2ac…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 13:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a654964f26a8db72cb4626ad7af9898 SHA-1: 6e6f5ce0cf411c67adc607fea54ef34efdb848dc SHA-256: a8701b3ee868f2ac8e3b6e719d4a6d60470d930d72f119d1de988c854a5ff2c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '3d animated cartoon powerpoint templates free' and the malicious URL. This suggests a lure to a malicious site, likely for further exploitation or credential harvesting. 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.ru/pify?keyword=3d+animated+cartoon+powerpoint+templates+free
    • http://fuvef.homebirthsupply.com/uploads/1/3/1/4/131452846/7192183.pdf
    • http://zunop.kisdesigns.net/uploads/1/3/1/6/131607062/beveligas.pdf
    • http://files.scunthorpedivers.co.uk/uploads/1/3/0/8/130873717/464c6e0.pdf
    • http://files.makohandknits.com/uploads/1/3/0/7/130739155/gipifaxetut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/94308917667.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1903/files/adjetivos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/aao_na_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/98902356210.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/27898060620.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/atlas_world_map_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/best_free_spotify_playlist.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1119/files/oxford_bookworms_library_stage_6_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/fibutevupaxig.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6898/files/betheme_header_builder_plugin_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5666/0633/files/jalekobamososefezis.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/56976972495.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067de.bin
a6a5b1a24214e766aa99d3e219ccbb617a251b72a6350dc0e0f11a21abc4a9a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 5464 bytes
font_01_sfnt_off00007a5d.bin
b0766f54e8d58a0bb141fbdfc1389cdcbaab6e6df76d09b12627f17460e04dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 10088 bytes