Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ef15b8dab16be3…

MALICIOUS

PDF

56.9 KB Created: 2020-08-08 13:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b4767765e5714255eeed552f831cd4 SHA-1: 7ecee8c4d6c500ae02875031b6778f87b88c3a76 SHA-256: 78ef15b8dab16be32df8e918001bbfad48ae46844ba010f63a811490822bb609
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=teaching+approaches+and+methods+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to academic resources, suggesting a lure to disguise the malicious intent.

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=teaching+approaches+and+methods+pdf In PDF document text
    • http://files.iwfgeorgia.org/uploads/1/3/1/4/131455883/dofez.pdfIn PDF document text
    • http://files.simonkennedy.org/uploads/1/3/2/7/132740778/dimotilenasiranofif.pdfIn PDF document text
    • http://nalefoxu.longwoodpsychologicalcenter.com/uploads/1/3/2/6/132682646/kofuzazimiwam.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/1/0431/9199/2480/files/63820406644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/vupolanixesitabigika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/vefomamasemalapup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/82651580235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8269/8142/files/introduction_to_physical_anthropology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/zojiziliramezojutuwati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/53514727925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/baregijawufokagigeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/la_jolla_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/zopagozagunedixajotozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/21278991308.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_off0000a160.bin
ad1d173e21362965af65cd1a9993bddf5ee671410699d6cf3cc4243e3283fea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA160 5488 bytes
font_01_sfnt_off0000b3e1.bin
200305f46adc5258dbda5e85411fd843a10f8a40db66d151c3f6d0d805bffddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E1 10076 bytes

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