Malicious PDF — malware analysis report

Static analysis result for SHA-256 99429d982601bc98…

MALICIOUS

PDF

45.4 KB Created: 2020-09-17 02:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7edf500c0c81fe3fe24e270ac1a6f5c SHA-1: 9e6d12fa80a57206bbfcb4a2ad1b9f950322d424 SHA-256: 99429d982601bc985ad5e3386b3297856991f379744caace657d59ebf05ea837
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=talkatone+apk+download'. This URL is presented within the document body, suggesting a phishing or social engineering attempt to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=talkatone+apk+download
    • https://f0d9b704-21d3-4292-a9ae-f71d09709e76.filesusr.com/ugd/9b7d8a_c1e93511065642aaa40d608927e014c8.pdf?index=true
    • https://f972a361-8678-4688-b917-fab424ca380d.filesusr.com/ugd/585b1d_7009f8865f5c41b0875a3e530cce847d.pdf?index=true
    • https://e78b7c1d-273e-49bd-945e-a7e2ad61fcce.filesusr.com/ugd/ab5adf_8780aeb6fe0743689a0b0bf5acc24849.pdf?index=true
    • https://6823df9f-2257-4c24-8fed-209807c12bd9.filesusr.com/ugd/f1780b_1169ca41608f400d9305bec5ecea4060.pdf?index=true
    • https://5f258df2-b69b-441f-a54b-c8927919d9a1.filesusr.com/ugd/1acd69_0464ef6cd5fb4bbc8cf88674dfd83eb4.pdf?index=true
    • https://99db348c-2a89-4f04-b4b1-e4e4a90a64a3.filesusr.com/ugd/ea2f88_c74c69ea8c684cb7abb3b19dcc0a2e35.pdf?index=true
    • https://b392c9de-3d40-4994-b892-006b2a511e8c.filesusr.com/ugd/ac1638_225ca7908fa54624a6784394083e579e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/93508705663.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/unifi_ap_ac_lite_quick_start_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/48034048894.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/timberlake_chemistry.pdf
    • https://a29b6c0b-8369-4261-a753-5d97337b1eb3.filesusr.com/ugd/c4dbd3_d2e06000de9c402bab0ccb6881032494.pdf?index=true
    • https://fd6d2f12-77c6-4cd8-b33d-cb954e895e66.filesusr.com/ugd/9ef0c3_c97488516b454679b8ac1dda6bc4743a.pdf?index=true
    • https://9ba4ced8-1a25-4584-9457-abc8e3729833.filesusr.com/ugd/3f80ec_ff1c158a8e994bdaaf3edf722ae76b77.pdf?index=true
    • https://ba681c0d-9834-4fbd-bab7-6cf9adb7874d.filesusr.com/ugd/39d081_bd11883bb6874fbf99438f4a4feedada.pdf?index=true
    • 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/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f0d.bin
549a1617218d030011885f25f01f56a1ba2becbadcd534007f7e3b5b9febc4a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 4784 bytes
font_01_sfnt_off00007f77.bin
787531fbff541c9fdfc4e9ddefaee1ab4489e7f5d43d508ea9abbf045e3f08ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 13204 bytes

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