Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f2fca3010fc2ec…

MALICIOUS

PDF

45.6 KB Created: 2020-08-23 06:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8464751a8b57d81e016bc60a498d4ff8 SHA-1: 24713e9e989303f2771869de201f712e6a5a89a7 SHA-256: 14f2fca3010fc2ec1939623aaea2404ac72a905c015b38ca5a52ac2af71bc3d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, reinforcing 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.ru/pify?keyword=22+se+srabon+bengali+movie+song
    • http://dofup.nhfd-dev-site.com/uploads/1/3/1/8/131856080/bezavefosig-puzositigiku-gabitapeno-turukufujoji.pdf
    • http://mebewuro.treatreads.com/uploads/1/3/0/7/130774982/nedukipaba.pdf
    • http://files.dataanalystsusergroup.co.uk/uploads/1/3/0/7/130739544/5229702.pdf
    • http://files.scatkofamilychiropractic.com/uploads/1/3/1/8/131856271/bogor_funefeg_lixanoxipodonu_nuwanaxitapeni.pdf
    • http://tavanarix.kpcecala.net/uploads/1/3/1/3/131383770/kitafituvozowusale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdf
    • https://cdn.shopify.com/s/files/1/0433/8440/6181/files/nufazepevizixanijijidipem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/jupiwarawibifuruxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/refejebokijetoverepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/barrier_free_environment_in_schools.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/99158423998.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/brush_stroke_photoshop_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/interview_skills_activity_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/flight_of_the_bumblebee_tenor_sax.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000652e.bin
8ee6c22e226d10ecb4f02b6a825b4e4e88e6043b9bf9a019b2c37c65c29473a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 5244 bytes
font_01_sfnt_off000076e4.bin
7f650ebb640b54c47b0a594b27f5f4a16d014f4f3d553714ace8d2ba260e844e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 4716 bytes
font_02_sfnt_off000085c0.bin
80ab234fa62c2ceae21ca5b0df8d60cf65d3a2e2833ebd1d7355be77efc471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C0 10352 bytes

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