Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f007cbb3e8575b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 09:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d64fa8cca93a4bae654b72b658ca94 SHA-1: c5201bd79f298e841ac818353904c94d5c460c9e SHA-256: 15f007cbb3e8575b939d467099bb8f194fcfdcec4b9a3242cd8d926cf937449e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into clicking links that lead to malicious content, likely a phishing or malware distribution 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/pify?keyword=2019+new+happy+birthday+song
    • http://maxune.alpost522.com/uploads/1/3/0/9/130969627/000b96aece254b.pdf
    • http://files.inharmonyliving.org/uploads/1/3/1/6/131637679/523121.pdf
    • http://dozaza.urbanoasisproject.org/uploads/1/3/1/4/131437425/tuwaziw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/atomic_habits_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/jubujowapatezig.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/exploring_science_working_scientifically_8_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/minecraft_pe_0._12._0_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6315/5615/files/verbal_reasoning_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0444/3983/0695/files/fairy_tail_episode_227_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/jifaxileviliwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/the_brightest_stars._poar_zmysw_anna_todd.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/toyota_avensis_2005_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/nulowebiwigesepugovube.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/fuguzijuf.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_off000066c6.bin
bef46c281c99a8b8ee3b94b69d38b914cd7599ae2033c76387c69b4198fc9534
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C6 5908 bytes
font_01_sfnt_off00007ade.bin
3f99cd9badc077dbdf43f5302e0e5df3b7ee025ada6b7142a1366634772f58e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 10336 bytes