Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e7856914c6048e…

MALICIOUS

PDF

35.2 KB Created: 2020-08-24 22:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0efc6fee9bd6af5fab4896a2bbaff4c4 SHA-1: a2a982d462c1777e78e558b71c538f010a456fa8 SHA-256: 96e7856914c6048e4446196559b175151979c6b97ed4a45387a7a6a6337f48a8
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on Shopify. This suggests a delivery mechanism for malicious content, likely phishing or malware, disguised as an annual report.

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=hollister+incorporated+annual+report+2018
    • http://files.halfasshomemaker.com/uploads/1/3/1/4/131453022/ganavop.pdf
    • http://files.phoenixtherise.com/uploads/1/3/1/3/131380480/sijoxabagorekur.pdf
    • http://files.interdisciplinaryexchanges.org/uploads/1/3/1/4/131453559/bc4a72e97481.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/varisiwegizib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/spelling_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7293/files/76484677230.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/return_man_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/zipobibujasarojodewazaru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/aalala_kanda_hd_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/convert_to_word_doc_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/fezukez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/7467957320.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/hemzone_gamestart_mouse_manual.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_off00004d78.bin
809832b07745293c2acc8eb7421c6508cd4490252b964eb8ffd512fdced65726
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D78 5548 bytes
font_01_sfnt_off00006058.bin
2269057eb57a9a3cc32f68774c53b5e048a527a58661afd8144fc2902b1b90d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 9220 bytes