Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a7de6b4efb82c7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-27 16:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7633d5783db73ac2702790fd55329978 SHA-1: 51699d5cd708f81baa35a69b16b2519e37135bef SHA-256: 89a7de6b4efb82c7e74d9cf4250a02acc7d00136c938843a1702e391674dbf94
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to host numerous PDFs. The primary malicious URL identified is https://ttraff.ru/pify?keyword=nba+2k17+digital+code+free, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to "Nba 2k17 digital code free", reinforcing the lure.

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=nba+2k17+digital+code+free
    • http://files.sixinseoul.com/uploads/1/3/0/7/130775357/2c5f53008f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5332/6241/files/1393289110.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/39917246979.pdf
    • https://cdn.shopify.com/s/files/1/0435/7128/2079/files/85257677430.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/jixotilozawafi.pdf
    • https://cdn.shopify.com/s/files/1/0465/5123/6766/files/download_wizkid_daddy_yo_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/99471555748.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/kalikasan_ng_akademikong_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/45976502972.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/xipozimunujepulotebe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/27814448555.pdf
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/manual_de_barras_de_access_consciousness.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_off00006cc7.bin
7ed60ef29d0cff874f3e1672dc0070c3c8c533195d81abbfd169e2afa9eff8fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 5448 bytes
font_01_sfnt_off00007f70.bin
ba4ad0452137a5a5f9e1d0eaf2b4966acc9e5e8f16d386ebf38cbb58629b3b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F70 10436 bytes