Malicious PDF — malware analysis report

Static analysis result for SHA-256 120aae332a9424d0…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 11:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fceae024cc645e0e35a097510278857 SHA-1: 5344845874e8d3bf497f4a1d18ee8a8ea7f6907d SHA-256: 120aae332a9424d029cd7e3afb86639c108450298a024578a53701ce5f556a34
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure suggesting changes to payment instructions, a common tactic in business email compromise attacks. It embeds numerous links, including one to a known malicious redirector at `https://ttraff.cc/wix?keyword=permanent+accounts+would+not+include`. The presence of multiple PDF links suggests a link farm designed to distribute malicious content or host phishing pages. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to redirect the user to malicious infrastructure, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=permanent+accounts+would+not+include
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/68331108885.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/65661153987.pdf
    • https://cdn.shopify.com/s/files/1/0438/4397/7366/files/nagivebirikevakaberezutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/mujatasomiwoxetafatezet.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0982783c8a74a7fbd26e7c57e3af696.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_35e653a4fa064e6c8cdaa1d8459c6d2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_022b0d37a9d44b1cbbf68fabf55a8b34.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0815ec8331345a7bc46d36015fc39ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_60473a937dfa43919d06ae6992d61aef.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e0ae4b46e414e14a10645d9618d4e29.pdf
    • https://static.usrfiles.com/ugd/b8c837_172efa5ee21f4ac49c4e42bfffa82872.pdf
    • https://static.usrfiles.com/ugd/b8c837_20bf0c9171154a18bdc394bd83543d88.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c6.bin
50d3cdf85eac1a432d1c16fd9fe999d5def0c05da6f211575333dac41ab9a62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 5060 bytes
font_01_sfnt_off000079dd.bin
6014284e8befd8d28ce10cf70c39b6a57314a86b175786642e65d21e211e393f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 10300 bytes
font_02_sfnt_off00009cce.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCE 4324 bytes

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