Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c0f855762d30d6…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 17:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9456a6437fd031c9591853d12d7ff18 SHA-1: fb49dcee2d2fc999a5acafd96a841959583682b5 SHA-256: 66c0f855762d30d69cac41cf3f586f575d06e99ae3c27511a967eaa078e0638b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though obfuscated, contains text related to Adobe export PDF services and the URL that triggered the malicious redirector heuristic. The presence of a link farm and a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=adobe+exportpdf+sub+adobe+systems+san+jose+ca
    • http://files.singleparents.co.nz/uploads/1/3/1/4/131407709/fuwaweleveda_nikalumezu.pdf
    • http://files.leggsmanufacturing.com/uploads/1/3/2/7/132710776/wunukemerosopajusup.pdf
    • http://pisoje.daniellereneewallace.com/uploads/1/3/1/8/131872225/bc97b.pdf
    • http://xidulu.kk-blc.com/uploads/1/3/0/7/130738720/6240887.pdf
    • http://files.americanwellnesssolutions.com/uploads/1/3/1/3/131382346/fasibas-zubigew-soxazefawad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/85167680282.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/1096049657.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/37415074859.pdf
    • https://cdn.shopify.com/s/files/1/0434/1121/0398/files/jobutuwojixevewi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0138/6920/files/rerebozufanujoxukaluza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/rijirumifigubikawemawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/44127107832.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/witch_doctor_leveling_build.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/67784454406.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/sexupeluvaruvod.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/english_to_spanish_translator.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/22378880548.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/4562364199.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/84134067778.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000746c.bin
2cbbc2984d6281e6f6f7b7ce969866913056cb729ea8b8a5b3dd659821bc6976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746C 5644 bytes
font_01_sfnt_off00008796.bin
1d2980c27cbaaeaf953d6a61126eeee1f3126f7e6b0a362f4bbf71336fb8ff0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 14984 bytes

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