Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1b78ab7a892d7c…

MALICIOUS

PDF

45.5 KB Created: 2020-09-04 22:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 60fbe9962aaef0516dee44a4d00ec743 SHA-1: b7fd1d0d5866ef9afac0f818fa39904d158617a7 SHA-256: ff1b78ab7a892d7cd61804d0e0ae7060cd5d7f34aee1d9450157b3820e51d92c
162 Risk Score

Malware Insights

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

The PDF contains embedded links and text suggesting an invoice lure, aiming to trick users into clicking. The primary link, 'https://ttraff.link/pify?keyword=free+invoice+template+microsoft+word', is identified as a malicious redirector. The document's structure and content strongly indicate a phishing attempt, likely to deliver a secondary payload or lead to a credential harvesting page.

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.
  • 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.link/pify?keyword=free+invoice+template+microsoft+word In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/81243334253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/36091298632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/naxolipevevidejexawil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5899/files/pakanirakinewuxutodegipuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/biology_book_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/bhagavad_gita_quotes_in_tamil_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/natofuzit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rilowujokik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/67759144273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/kejexese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/85546755422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/93490491782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/83211880532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7959/6187/files/cordon_umbilical_corto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4746/6661/files/15252485927.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 5408 bytes
SHA-256: e3cdb6805490f8dd41baffb5003999e85650855a8ce7f4c7166b0c5772203abf
font_01_sfnt_off00008555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 10332 bytes
SHA-256: c6080ebb64623e252d2d16614e8042e1bfc7dc623c867898d6aa7174bf74b314

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