Malicious PDF — malware analysis report

Static analysis result for SHA-256 6628d00f77f791b1…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 18:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900393e108c4dbad4b9683c6d32df230 SHA-1: 96239646fdbe0153d2895df5eb9a240b3d367aba SHA-256: 6628d00f77f791b19359c6a2eea9aa8ed84e92871c16e08b4efcb727f9f5caa8
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to financial applications and the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content or engage in SEO manipulation for phishing purposes.

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/wb?keyword=axis%20mutual%20fund%20sip%20application%20form%20pdf
    • http://salizipag.yourconciergect.com/uploads/1/3/0/7/130775531/3242999.pdf
    • http://files.rimbeycrc.com/uploads/1/3/1/3/131378942/c0c34c6.pdf
    • http://kedaxoso.lakedevonshirehoa.com/uploads/1/3/1/3/131398372/ef18cd480883b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/xuxizogumajenetunez.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/cammack_upholstered_platform_bed.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/46833589394.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/rovizotifuwuluw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/xejesajotigomusunozamup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/46726302042.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/data_analysis_software_spss.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/add_adobe_plugin_to_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/35586374739.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/xedebixonepunubivez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/bupeki.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_off00007558.bin
faf9d38fa5c9eabd0f67fbaa2f956d0bb882ca5d9d187e6cedde29efdc6f5944
pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 5360 bytes
font_01_sfnt_off00008770.bin
31d8747cb2b5f3c293d5723a1e7f6b2ac9e3396ddfaefa1cca568b54b0722e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 10748 bytes