Malicious PDF — malware analysis report

Static analysis result for SHA-256 1082b09e5f4e1359…

MALICIOUS

PDF

38.1 KB Created: 2020-08-05 23:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d5c462d2b3cc11a8f6e369ff8ffa708 SHA-1: 5a0e797467046a9300152a82df9d23844d6861eb SHA-256: 1082b09e5f4e1359734e6975f8a204c45125c7172552e65c91f61a7f7b5080ee
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to host SEO-optimized PDF documents. One prominent link, 'https://ttraff.ru/pify?keyword=pinch+of+nom+book+pdf+download', is identified as a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=pinch+of+nom+book+pdf+download
    • http://files.makerystudios.com/uploads/1/3/1/4/131452794/setaterifaxizo.pdf
    • http://files.treeservicefresno.com/uploads/1/3/1/3/131379830/fepenomewevidap.pdf
    • http://files.northwoodshaman.com/uploads/1/3/1/6/131606546/dbae9.pdf
    • http://files.saltedsage.com/uploads/1/3/0/7/130740213/4047638.pdf
    • http://files.israylcommonwealthministries.org/uploads/1/3/0/8/130814682/6512879.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/54229501656.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/b_tech_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/salukizujudizizulexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/65785406227.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/sowet.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/vocabulary_for_ielts_speaking_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/55342099105.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/tepavilijejanivirolonagep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/escape_from_tarkov_guns.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/boripoburagorizejixagemom.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/46513206972.pdf
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/64688701816.pdf
    • https://cdn.shopify.com/s/files/1/0435/6715/3313/files/tubadevufanojamirabapo.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_off0000560d.bin
dbda3c46d72ae46f7935d58709e9bd904388c9475106c3f1632da5f32e6f32ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560D 5416 bytes
font_01_sfnt_off00006868.bin
bbecdd28496b6c1b3da41136248ed415af029b8ea7713b9108ea2ef174b9e561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 10240 bytes

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