Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8678c2e3d67317…

MALICIOUS

PDF

39.8 KB Created: 2020-08-24 02:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c4d949e38852ee83f4be6be070aacff SHA-1: a6a982d14a0334687cd3833ce09616a861653cd8 SHA-256: 6a8678c2e3d67317e3792414abd1bfb998ccff9e276e164bd5fda91ced13f3f0
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to a 'certificate of insurance form free' and embeds numerous links, many of which point to a link farm. One critical heuristic indicates that a link within the PDF redirects to known malicious infrastructure at 'https://ttraff.cc/pify?keyword=certificate+of+insurance+form+free'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=certificate+of+insurance+form+free
    • http://nirarasu.santosmiller.com/uploads/1/3/2/7/132740435/2956856.pdf
    • http://benusapi.yvonnegordonmoserart.com/uploads/1/3/2/8/132815758/mapagufaboj.pdf
    • http://files.oakridgefootballbooster.com/uploads/1/3/0/8/130873718/jivosipipofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/92106288073.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/gazalufisiwefeperizuxaguj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/road_safety_awareness_programme_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/event_id_4624.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/xakapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/banking_terms_gradeup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/13285903133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/97874952.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/classifying_rational_numbers_worksheet_lesson_2-_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/49232482492.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/51393882477.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/vocabulary_games_and_activities_1_vk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/susogafewikosuwenanixonog.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_off00005fff.bin
93313f91e4a954ce33355dad5b4bcabfcb57b38b76caa6beefc6b8e692c21573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFF 4900 bytes
font_01_sfnt_off0000708a.bin
d0d1e161d785c73afb65d85ce9d89d6b3f4a2895d22ca8fa6468440ade1abece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 9876 bytes

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