Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcdd899e3874dbb…

MALICIOUS

PDF

50.5 KB Created: 2020-08-14 23:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d72dc146ebdf9ab114e517d72189616a SHA-1: ec0652ea3f338e71c6efb0331da5a0894086590b SHA-256: 6bcdd899e3874dbb7112155cacd2ff9a32fdb7bc531ab3588562fd18d8104ae9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign Shopify URLs but one points to 'files.briorecordings.com'. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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/wb?keyword=polycistronic%20and%20monocistronic%20rna%20pdf
    • http://files.briorecordings.com/uploads/1/3/2/7/132712139/ruroxamekuvofix-wogofaxus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/25128671173.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/31545294351.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/que_es_el_microscopio_optico.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/6765556976.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/9789112456.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/23023653369.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/john_deere_212.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/57186042990.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/30750364481.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/asme_b16_47_series_b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/d_alembert_principle.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/mazofumetejaniruvoxuride.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/soguxojuminugarokome.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/zovesebe.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_off0000880f.bin
230de6c8a32e503f4f3555012ed7632317db8d580f759c939ef910e5ae7de7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 5404 bytes
font_01_sfnt_off00009a54.bin
0168e3d40d8e06c2c8e23280543b7f8a9f7580c3e2b8eac18185dad1ac8c8b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A54 10008 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.