Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad28413a285f1b82…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 13:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b23bf3e3f0a575a48aa1b976b05df5c4 SHA-1: 2fca48ce68ec742e868f2e883c25b480354ae3e5 SHA-256: ad28413a285f1b82b8680d320eda2eaf5be4c2337d06be9c23ee8fcdbcc6e1c2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Funny video pakistani reporter' and the malicious URL, suggesting a lure to a malicious site. The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=funny+video+pakistani+reporter
    • http://files.twobucksandadoe.com/uploads/1/3/0/9/130969717/fategiragukipop-zemon-lupowupakixal.pdf
    • http://files.suusigmachi.com/uploads/1/3/1/0/131069992/fevosofonewug_makadelixojolos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/business_english_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/tidonobopuradegokimugatir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/totoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/ophelia_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/76768247736.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/kogexizepexufa.pdf
    • https://cdn.shopify.com/s/files/1/0447/8572/9685/files/zofus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/apache_server_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/68649868064.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/thomas_calculus_13th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/nipavimofekedigopir.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004594.bin
306bf9e75118b5800ab2952de562c4dc81527322d37c3f3f1481f3d27b495f6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4594 5104 bytes
font_01_sfnt_off00005704.bin
5d1fc49e2bae46304afb8af97131fd20d0c7f8006a343352cafd8012b112c60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5704 9140 bytes
font_02_sfnt_off00007689.bin
9eefe776dc8d595dd4bd340f1190c41a1c5f6c388e24d83b3baef48f90507c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7689 5860 bytes

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