Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db312d217a0cdf4…

MALICIOUS

PDF

47.5 KB Created: 2020-09-01 08:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca50e4dd392a6dd00af5b7d91eed6a8 SHA-1: fad2b02970100f6230e998618542249ec0d0239b SHA-256: 3db312d217a0cdf48676d66a4d0ad487b1a3c96fe5054940b6a7c2368935af87
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.cc/wix?keyword=why+school+uniforms+are+bad+uk'. The document body, though heavily obfuscated, includes this URL, suggesting a lure to a malicious site. The presence of a PDF link farm further indicates an attempt to distribute malicious content or engage in SEO poisoning.

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/wix?keyword=why+school+uniforms+are+bad+uk
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/airlift_songs_maango.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/topawegipim.pdf
    • https://cdn.shopify.com/s/files/1/0457/6831/0950/files/spotify_android_app_account_settings.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c30be4bc93049b48aca438e8d593c9a.pdf
    • https://static.usrfiles.com/ugd/493135_e34e12323b1248feaca239c98e572022.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e9be0217a2c438ca5ca0ecfe9722218.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_13755db4fd974d45a85edd2d96594f52.pdf
    • https://cdn.shopify.com/s/files/1/0462/3902/3253/files/song_wainame_by_sailors.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/69441787121.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/telecharger_encyclopedie_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/jijefamuveravefafufibarav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/ts_eamcet_bipc_allotment_order_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/85897849648.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/fivizimetofajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/84082548587.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da7.bin
b4a85117349f95fe355f9387ec10905388a9f2a4171c5a32f51285c107cb4feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5384 bytes
font_01_sfnt_off00007fbb.bin
1b86508abf9ee28bbce65d6c0d0178dd7a48d17521ac902c9ab2a76bc4f5ba99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 10228 bytes
font_02_sfnt_off0000a2a6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A6 4324 bytes

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