Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca16c7cf7a7d7311…

MALICIOUS

PDF

37.5 KB Created: 2020-10-02 03:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5b62acc009d09e6b4fa3e68bd2c4ee4 SHA-1: 082fc49a6417291d5ce575da8e91d384c8ef2c84 SHA-256: ca16c7cf7a7d73115862fd2afd4cb8ee33f7ce97ba530e767dd7c72ff9c55115
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/pify?keyword=franklin+county+child+support+enforcement+agency', which likely serves as a gateway to a malicious payload or phishing page. The ML classifier also strongly indicated maliciousness.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/pify?keyword=franklin+county+child+support+enforcement+agency In PDF document text
    • http://gigerom.hiddendragonmartialartsacademy.com/uploads/1/3/1/4/131453540/90566c0be5.pdfIn PDF document text
    • http://matal.headwaterspropertyimaging.com/uploads/1/3/0/8/130814085/8bbe07313ef323.pdfIn PDF document text
    • http://files.bhutandruktravel.com/uploads/1/3/2/6/132681690/wezifedakikofeko.pdfIn PDF document text
    • http://files.horsetherapycanada.com/uploads/1/3/0/7/130739873/aa65fba614.pdfIn PDF document text
    • http://files.corsettiparalegal.com/uploads/1/3/1/6/131636692/8563576.pdfIn 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/1/0435/4621/4564/files/vepifizeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/kuwigekoniburive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/9345/5772/files/84387189027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/the_holocaust_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6317/6085/files/amcor_air_conditioner_sf8000e_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/nixedugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/google_docs_mp4_endgame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4039/3384/files/sexumijofagevuvige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8c7b56-64c2-423f-b955-6d01182ee236/70562620222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f3626e-acb8-42e3-a092-08c86984e40c/fowewakojepoboxubep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db068406-2da0-4936-ae7a-fc37ec3ac865/jofitizaliviruvaxuboje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397280c1-fa8b-42ca-a6c3-26d582be1c9a/78255797379.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_off000053de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DE 5688 bytes
SHA-256: bbbc9db54f8e069457252118b70b41933996bf0df8cb8798d5757f99c03ab377
font_01_sfnt_off0000671f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 9900 bytes
SHA-256: 46cb1090083122c643e2a0d7ec108e3afc6e85d764508df6af2be35b0eac1f3a

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