Malicious PDF — malware analysis report

Static analysis result for SHA-256 090e183d26045bba…

MALICIOUS

PDF

41.2 KB Created: 2020-08-06 22:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f97580ea0a306c4335a0096c95092ca SHA-1: 2456058983443b8451a74ff27393c0fa2954beae SHA-256: 090e183d26045bba5e6d1c77bbb0b034995d0cda7124f206cd47b285615f34ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=bv+doshi+books+pdf'. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users into believing they are involved in a lottery, prize, or parcel delivery scam, which is a common tactic for advance-fee fraud. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.com/pify?keyword=bv+doshi+books+pdf
    • http://files.borlandclinic.org/uploads/1/3/1/3/131380213/julera_pitokuzat.pdf
    • http://josib.ssaanewhaven.com/uploads/1/3/1/4/131453177/zunedewida.pdf
    • http://files.tonkabaynewfs.com/uploads/1/3/1/1/131164425/nuzat_winufivaru_wigokalo_migamuni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/nunirisofera.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/wave_incense_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9196/files/psychology_facts_about_love.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/fijitixuxibilanisuvozorof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/kilujunemelagutex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/73895305932.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/32529064637.pdf
    • https://cdn.shopify.com/s/files/1/0440/3757/0710/files/27749789458.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/wukuzev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/sample_php_ini_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/anamnesis_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5772/6118/files/suriwafada.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_off000060b5.bin
445014e563093e51a16878b9c0f85ac0c936123655adf58ed8c073d6beddb443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 5104 bytes
font_01_sfnt_off0000721f.bin
b40bb18b96e065bd895600e41919d5f02e43835ac61704c5c7f4181680489c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 10876 bytes

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