Malicious PDF — malware analysis report

Static analysis result for SHA-256 4662510a51d6995a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 16:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c1482bb74925ea6e13f9c8f6dcaa41a SHA-1: ecd42aa2c23a497e593c7025a6ffa66f20f572d2 SHA-256: 4662510a51d6995a5915b3deed8f7c6dafa1b4c1b3cfcc3d5816fedbd1f3a85d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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=antenna+theory+analysis+and+design+balanis+pdf
    • http://files.yourpassionategroomer.com/uploads/1/3/1/6/131606346/3709074.pdf
    • https://cdn.shopify.com/s/files/1/0433/4249/5895/files/72553961289.pdf
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/gewinetupuporu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/my_mic_isn_t_working_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/cutnell_and_johnson_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/51054428398.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0181/files/vapour_absorption_refrigeration_system_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/69605477534.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/nodebagadinazelilajibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/13542283525.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/babed.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/
    • https://cdn.shopify.com/s/files/1/0427/9212/4572

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006336.bin
415a432450a021983bdf035a0e41b87a54874c74ff781cef89d221ddc3833714
pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 5532 bytes
font_01_sfnt_off00007600.bin
0c24f652fd2af3a0ceb64de0ee73b12c7ede38d1f6cb6d01b6fc993bc90453ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 11536 bytes