Malicious PDF — malware analysis report

Static analysis result for SHA-256 49328b15d2156535…

MALICIOUS

PDF

49.6 KB Created: 2020-09-02 23:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd2a78ee9795efc69ffe97132e2ad23a SHA-1: 26c0507900f64e9c762bab86822a93e41b07513d SHA-256: 49328b15d2156535d916e30e5d5ed7e67d5f26b3a04a42ab9374c21683615192
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.club/wix?keyword=android+vs+iphone+users+phone', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination. The presence of a link farm and a malicious redirector strongly indicates an attempt to lure users to a harmful site, likely 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.club/wix?keyword=android+vs+iphone+users+phone
    • https://static.usrfiles.c
    • https://static.usrfiles.com/ugd/33ab24_964e3d2171e5494ab83640ea7c059e5a.pdf
    • https://static.usrfiles.com/ugd/cec570_035f0cd37aa44ec19981d1bad9ec6390.pdf
    • https://static.usrfiles.com/ugd/451461_df1875679ac74107b9df23d7b2689b22.pdf
    • https://static.usrfiles.com/ugd/7f16bd_cb55081b7e6a4d8a99d0864aff2b01ad.pdf
    • https://static.usrfiles.com/ugd/2e16aa_9c06c1222f474d19b5cff1eae709e3af.pdf
    • https://static.usrfiles.com/ugd/f63f29_f0d4a732791f41e8bbf76a8bd504a440.pdf
    • https://static.usrfiles.com/ugd/affb4a_b15fd3dfbfdb4dcbbdf413f7ad774afa.pdf
    • https://static.usrfiles.com/ugd/0b46e6_45be8bfa1b904600bbe36d06bb57a1a4.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/nazalabosolewuzaguvoxot.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/woxizufuneta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/bofumazop.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_a6db81beb039465e99849cda236601b9.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_744a88bc93f446d3b58bd53e7336cddf.pdf
    • https://static.usrfiles.com/ugd/b8c837_896367473ce44bd59dd3671ef063cd83.pdf
    • https://static.usrfiles.com/ugd/b8c837_fafeba85272149c8a146bdad6c8026ef.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_9188ede7916d48a9b20ce58220cb2a52.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_off000084a5.bin
6c1650b275fff0a33cdbef4e96bb55abbe6874f923ee1c2a4dc3214860f6beae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A5 4856 bytes
font_01_sfnt_off0000952b.bin
1790339365289fe5b3e50544fc98f576a9cbbd1333f2081596245ccf492099a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 10512 bytes

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