Malicious PDF — malware analysis report

Static analysis result for SHA-256 410ebc71e72b83e3…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d73962185701ecb5ee0b0b744de288a SHA-1: 468fc1db8b87e4fac9d17700459bdf3bf939c404 SHA-256: 410ebc71e72b83e370780ce071d5777b4358e3b0f502a3e281d50150ea09ba57
152 Risk Score

Malware Insights

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

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 embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site for phishing or malware delivery.

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=x%25C3%25B3a+b%25E1%25BB%259Bt+trang+trong+pdf+online
    • http://files.plymouthfamilynetwork.com/uploads/1/3/0/9/130969939/mofamakewanaxu.pdf
    • http://files.autobodyassociation.org/uploads/1/3/0/7/130775245/fenovi_jijomidul.pdf
    • http://files.hcteecompany.com/uploads/1/3/2/6/132682790/xasede.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/76317042961.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/fasabebinili.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/91358679028.pdf
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/kifotugefino.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/94835155088.pdf
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/engine_ignition_timing.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/roroxofurakomuwixadida.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9101/files/18772721417.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/indonesia_visa_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/gutedolase.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_off000052f8.bin
95df10e69e64ef4e53ef015c210c1c9a4491bb6ae3a5c3634c8b36840f53b69a
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F8 5448 bytes
font_01_sfnt_off0000652b.bin
f6834ebd6621137f34f99a95a02c32d588883a2a43e8945f733128ce1ba76905
pdf-font-stream PDF embedded font (sfnt) at offset 0x652B 9984 bytes