Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2c31d26b49027c…

MALICIOUS

PDF

43.8 KB Created: 2020-10-04 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e1313dd31b166422945c1b4af18f305 SHA-1: 79ca59ac53db054b9f7f93aaf361b33691b72b33 SHA-256: 6e2c31d26b49027c30148aed93ec3a013525100266d1f49fdc97e17a40881397
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=nth+term+test+convergence In PDF document text
    • http://fubakus.owsmoonshinecake.com/uploads/1/3/0/8/130874104/7473366.pdfIn PDF document text
    • http://nuluna.floatspa.rs/uploads/1/3/2/6/132681237/zolibawawir.pdfIn PDF document text
    • http://files.paterosriverrun.com/uploads/1/3/0/7/130740586/tikefavakavi.pdfIn PDF document text
    • http://joxokum.seedsofhopela.org/uploads/1/3/1/4/131406717/kijagavubal.pdfIn PDF document text
    • http://xixuja.pyco.org/uploads/1/3/1/3/131398140/jaxazep.pdfIn PDF document text
    • http://files.ashlandchristianhealthcenter.org/uploads/1/3/2/6/132681150/7e36e2e05af.pdfIn PDF document text
    • http://musiko.leonardos.org/uploads/1/3/1/6/131636727/4400880.pdfIn PDF document text
    • http://files.tigerphysics.org/uploads/1/3/2/6/132682124/0b8668318e6a950.pdfIn PDF document text
    • http://files.mcminnvilleaircraftmodelers.com/uploads/1/3/1/6/131606411/gefuxene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7d0cfaa7-c924-4063-9b91-5768f923a11d/bepipidugadusakop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5383108e-de76-4e86-950c-a4dd10996851/teradofod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9fe0d2-ee6f-49c7-85d8-9db315b33f1c/ratosaderesipeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d8e110-d140-4d84-990f-9346493c5c69/69587058737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04097ac5-e254-4925-83e4-8ec00df3a825/lawoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6212/files/the_great_gatsby_crossword_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/shallow_water_blackout_prevention.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8219/4330/files/79124218791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/organizational_culture_and_leadership.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/15469734442.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5902 4740 bytes
SHA-256: 826ad1ea16767ce876049f5a16167a96ffc4cf07ffd4884347b9022a4a57cefb
font_01_sfnt_off000068ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 13580 bytes
SHA-256: 46d986c00953b4b4e00a8c34067441f387303d4c6278259bc038a919577e154f
font_02_sfnt_off0000942d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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